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Uncontrolled hunting has destroyed a lot of wildlife and people have also harmed animals such as the passenger pigeon which disappeared completely.. Others including the whooping cr[r]
(1)BÀI TẠP ÔN LỚP 10 – Feb- 29 Feb UNIT : UNDERSEA WORLD …
I LISTENING : U9
Whales are mammals that live their entire lives in the water Some whales are huge The blue whale, for (1) _, grows to (2) meters in length and over 200 tons in (3) It is the largest animal that has ever lived on earth Whales may also be the most intelligent animals in the ocean
Whales like to feed in the cold oceans where there is a lot of krill-their favourite foo# D Cold waters in the North and South Atlantic Ocean and North and South Pacific are good feeding grounds for whales Some whales are (4) to migrate into warm waters to bear their calves
Whale populations decrease quickly due to heavy hunting pressure Conservation groups have asked the International Whaling Commission to (5) most whaling However, Native American hunters, such as the Eskimos, are still allowed to hunt a limited number of whales to feed their communities If no effective measures were taken to protect whales, these wonderful animals would disappear forever
1 A example B exam C examination D same
2 A 30 B 13 C D 23
3 A weight B wait C height D stay
4 A known B now C no D show
5 A stop B top C shop D catch
II.PRONUNCIATION : U9
1 A beer B tear C pier D hair
2 A bear B pear C dear D chair
3 A hear B wear C ear D near
4 A clear B square C where D dare
5 A tour B sure C sour D poor
III STRESS : U9
1 A Secret B Ocean C Migrate D bumper
2 A Investigate B Information C Submarine D Independent
3 A Maintains B Marine C Challenge D Device
4 A Community B Villagers C Diseases D Important
5 A Organism B Environment C Temperature D Satellite
IV.TENSE : if 1,2 / 10 SENTENCES
1 I'm not an astronaut If I an astronaut, I my camera with me on the rocket ship A am/ will take B were/ would take
C were/ had taken D was/ would have taken If you all of my questions, I anything to help you
A don't answer/ can't B didn't answer/ won't C wouldn't answer/ can't B wouldn't answer/ couldn't 'Here's my phone' number
'Thanks, I you a call if I some help
A will give/ will need B would give/ needed
C give/ need D will give/ need
4 Sea water is salty If the oceans of fresh water, there plenty of water to irrigate all of the deserts in the world
(2)5 If the train is late, we……… to the office
A walk B will walk C would walk D walks
6 If it……… … too much, I will buy the smaller one
A costs B doesn’t cost C would cost D cost
7 What will we if the taxi……….….?
A don’t come B didn’t come C doesn’t come D had not come If you drove more carefully, you………… …… so many accidents
$ A would not have B will not have C wouldn’t have had D has If he……… ………… up earlier, he’d get to work on time
A gets B will get C got D had got
10 I’ll it if he ……… me to
A asking B will ask C asked D asks
V.PREPOSITION: divide into, fall into, depend on, different from, contribute to, thanks to, be at stake, in the North/ the South ,provide sb with sth
1 You know, there’s only one ocean which is divided _ five different parts
A into B to C with D in
2 Marine plants and animals fall………… three major groups
A Upon B Into C With D Of
3 Some of the marine plants and animals live on or depend _ the bottom like the starfish
A on B at C in D into
4 Unless this biodiversity were maintained, marine life would be …… stake
A At B Of C In D On
5 Thanks modern technology, scientists have been able to investigate the sea-life A to B on C of D in
6 No matter how small or oversized, the ocean’s living things contribute their endless variety _ biodiversity
A into B to C with D in
7 The boy and his brother are very different each other
A from B to C with D in
8 The firm has provided me _ food and a car
A into B from C with D in
9 We grew up the South of Vietnam
A into B to C with D in
VI.SYNONYM :
1 marine = living in the ocean
2 tiny = extremely small
3 precious= valuable
4 carnivores = animals that eat meat
5 offspring = babies
6 beneath = under
7 krill = tiny shellfish
8 cover =spread 9 overcome = conquer 10 investigate = explore
1 Some marine animals are dangerous to humans
(3)A Over B Under C Above D On 3 If modern technology did not exist, we would never have such precious information
A Valuable B Precise C Confidential D Detailed
4 Sperm whales and sharks are carnivores
A animals that live in the sea B animals that only eat plants C fish that eat eggs D animals that eat meat 5 Seventy-five percent of the earth’s surface are covered by sea and oceans
A Faced B overcome C spread D spreaded
6 They can send submarines and devices to investigate the ocean depths, taking photographs and samples of animal life to bring back to the surface for further study
A trace B explore C track D look for 7 She came here with two offspring
A mates B babies C young D female
8 They spent their childhood in a tiny fishery village by the sea
A small B big C large D enormous
9 Whales like to feed in the cold oceans where there is a lot of krill-their favourite food A tiny shellfish B carnivores C tiny D marine
VII VOCABULARY : U9
1 These new farming methods resulted in crops A Cash B productivity C bumper D profit In the evening, they can listen to the news on the radio or watch TV for
A Relax B relaxed C hobby D entertainment
3 is the variety of different types of plant and animal life in a particular region A Interaction B Herbicide C Environment D Biodiversity Scientists have overcome many of the challenges of the depth by using modern _
A devices B methods C ways D Jet Planes
5 These scientists have collected different samples to _ for their experiment A reveal B protect C receive D analyze A female sperm whale gives birth to one _ after five or seven years
A Ox B Cow C Buffalo D Calf
7 Satellite photographs provide a wide _ of information, including water temperature and depth
A Rang B Ring C Rank D Range
8 What would happen if the sea biodiversity were not _?
A Obtained B Gained C Maintained D Attended VIII WORD FORM :
Verb Noun Adv Adj
1 depend Dependence
independence
Dependently Independently
Dependent Lệ thuộc independent độc lập
2 differ difference differently different
3 deepen depth deeply deep
4 Scientist
Scientism science
scientifically scientific
5 appear disappear
Appearance disappearance
1 We're reading _ books this week
(4)2 Can you tell me the between radio and television A differ B difference C different D differently
3 Fishes and sharks move of water currents while tiny organisms are carried along by the currents like the jellyfish
A dependently B independence C independent D independently The company needs to reduce its _ on just one pa rticular product
A depend B dependence C dependable D dependent
5 we can _ this swimming poor easily by the modern devices A deep B deepen C deeper D depth
6 For centuries, people have been challenged by the mysteries that lie beneath the blue of the ocean
A deep B deepens C deeper D depths
7 _ now overcome the challenges of the depth by using modern devices A Scientists B Scientism C science D scientist
8 When I was young, I received some training from my family A Scientists B Scientifically C science D scientific
9 If no effective measures were taken to protect whales, these wonderful animals would _ forever
A disappear B appear C Appearance D disappearance
10 I know that you don’t want to attend the party, but you’d better put in an A disappear B appear C appearance D disappearance
IX.SPEAKING :
1 Tom: ? Peter: I’m interested in seal
A Which animals in the forest you like? B Which animals in the sea you like? B Which animals in the mountain you like? D Which animals in the desert you like?
2 “ Oh no ! I wasn’t watching the time I missed my bus.” “ _ I will give you a ride home.”
A That’s okay B Yes C No D I’m sorry
X.ERROR RECONITION :
1 Would you like go to the café with me? A B C D Many kinds of tigers are at danger now
A B C D The bicycle is be repaired by my brother
A B C D
4 Because of the traffic was heavy, we were late for work A B C D
XI.READING :1
Read the passage carefully, then choose the correct answer
The natural world is under violent assault from man.The seas and rivers are being poisoned by radioactive wastes, by chemical discharges and by the dumping of dangerous toxins and raw sewage The air we breathe is polluted by smoke and fumes from factories and motor vehicles; even the rain is poisoned It's little wonder forests and lakes are being destroyed and everywhere wildlife is disappearing Yet the destruction continues
(5)seriously threatened And this despite the warnings of the scientific community and the deep concern of millions of ordinary people
Wherever the environment is in danger, Greenpeace has made a stand
Its scientific presentations and peaceful direct actions at sea and on land have shocked governments and industries into an awareness that Greenpeace will not allow the natural world to be destroyed Those actions, too, have won the admiration and support of millions
Now you can strengthen the thin green line; you can make your voice heard in defence of the living world by joining Greenpeace today Thank God someone's making waves
1 Which of these statements is not made? A Drinking water is polluted B Radioactive waste poisons the sea
C Sewage isn't processed
D Cars and factories poison the air
2 The writer _ A is surprised that the rain is poisoned
B is unsured why the air is polluted
C wonders why the natural world is being destroyed D understands why forests and lakes are being destroyed 3 What will be at stake?
A forests and lakes B Governments C factories D wildlife
4 Rainforests are being destroyed because governments and industries A are unaware of what they're doing wrong
B are rich and powerful C choose to ignore criticism
D basically care about the environment 5 Governments and industries _
A don't know what Greenpeace thinks
B are forced to understand the problems by Greenpeace C can easily ignore Greenpeace
D misunderstand what Greenpeace thinks XII CLOSED TEST :
The shark is a meat-eating fish and one of the feared animals of the sea Scientists identified about 250 species _ fish as sharks These fish live in oceans throughout the world, but they are most common in warm seas
Sharks vary greatly in size and habits Whale sharks, the largest kind of shark, may
_ 60 feet long A whale shark weighs up to 15 tons, more than twice as much as an African elephant The smallest shark may measure only inches long and less than ounce Some kinds of sharks live in the depth of the oceans, but others are found near the surface Some species live in coastal waters, but others dwell far out at sea A few species can even live in
_ water
1 A most B more C much D many
2 A of B in C as D at
3 A grow B receive C send D brought
4 A weigh B pay C stay D wait
5 A fresh B salty C salt D sugar
XIII.WRITING : IF 1,2 / 10 SENTENCES
(6)1 Keep quiet or I’ll scream → If
2 Stop talking or you won’t understand the lesson → If
3 Unless she is careful, she will cut herself with that knife
→ If She is not free today, that’s why she can’t go to the movie with her friend → If
5 He is so lazy, so he fails in the final exam → If
6 The car breaks down so often because you don’t take good care of it → If
7 I don’t understand you because you speak very quickly → If
8 I can’t this test because it is very difficult → If
9 It rains heavily, so we can’t finish our work → If
10 I never get very lonely because I have lots of good friends → If
Modal + be + V3/ed Might they _ persuaded to change their minds?
A be B are C were D been
2 Years ago children might be _ down mines at the age of six
A send B sent C sending D to send
3 Applications _ be sent before December 30th
A ought B are C should D have
4 Some pictures should be on the wall
A bought B brought C taken D put
5 This project will completed by the army next year
A been B.is C being D be
UNIT 10: CONSERVATION
I LISTENING : Listen to the tape and fill in the missing words
Have you ever seen a forest destroyed by fire? A great forest fire is an awful thing to see Once a fire has started, it spreads quickly _(1) say that late summer is the season when fire is the
_(2) danger to woods and foresters
They are very dry then Sometimes when the danger of fire is very great, foresters will not allow (3) to go into the forests
If people leave a camp-fire burning near a heap of leaves, this often _(4) a forest fire Campers must always remember to put _(5) their camp-fire and cover the place with earth It is the duty of every camper to take the greatest care not to start a forest fire
1 A Police B Foresters C Workers D Farmers
2 A hardest B largest C greatest D most
3 A someone B everyone C people D anyone
4 A causes B does C makes D comes
5 A out B in C off D about
II PRONUNCIATION :
Choose the word whose underlined part is pronounced differently from that of the other words
(7)7 A bad B double C doubt D bright
8 A psychology B potato C paper D possible
9 A debt B able C football D trouble
10 A recipe B special C repeat D receipt
III STRESS :
Choose the word which has stress pattern differently from that of the other words:
11 A vegetation B eliminate C disappearance D intonation
12 A photo B rapid C pattern D about
13 A environment B understanding C population D conservation 14 A impossibly B especially C naturally D importantly 15 A medical B pollutant C imprison D protective IV TENSE :
Choose the best answer
16 He back his hometown since 1991
A hasn’t come B haven’t come C doesn’t come D didn’t come 17 you ever to America?
A Was - travelled B Has - travelled C Do - travelled D Have - travelled 18 It _ since I stopped my work
A are raining B.has rained C were raining D had rained 19 This is the second time I him
A met B has met C have met D had met
20 I that novel several times
A hadn’t read B hasn’t read C haven’t read D didn’t read 21 Now my sister shopping with my mother
A was going B has gone C had gone D is going
22 Listen! Someone _ in the next room
A cries B cry C is crying D cried
23 It’s 12 o’clock, and my parents lunch in the kitchen
A are cooking B is cooking C cooked D had been cooking 24 Keep silent! You _ so loudly
A are talking B talk C have talked D talked
25 My brother _ next to the beautiful girl over there at present
A was sitting B sit C sits D is sitting
V VOCABULARY
26 Young animals adapt quickly to a new _
A company B house C environment D circulation
27 The storm didn't cause any _
A damage B species C plant D medicine
28 A is a person whose job is to look after the trees in a forest and to plant new ones
A teacher B forester C doctor D pilot
29 Elephants are an endangered
A vegetation B food C species D flood
30 We must a safe environment for our children
A make B invent C create D protect
VI SYNONYM :
31 Let's conserve our limited water supply
A protect B make C hold D consume
32 Our cities create serious pollution problems
A Nature B environment C contamination D elimination 33 She's not a regular employee of this company
A constant B skilled C amateur D professional
34 Tom's house was destroyed by a hurricane
A consumed B protected C demolished D removed
(8)A look back B look for C look up D look after 36 The shop sells a variety of goods
A establishment B diversity C food D plant
37 She'd hoped sleep would remove some of her confusion from her night
A eliminate B dream C wash D remark
38 Water can be held on the land by vegetation
A plants and trees B grown trees C plants used as food D the growth of plants VI WORDFORM :
39 This car runs on gas
A naturalize B natural C nature D naturally
40 Tom came up with ideas on how to make his business more successful
A vary B variety C various D variously
41 Tom looked around _
A carefully B carefulness C careless D care
42 We’re out of
A danger B endanger C dangerous D dangerously
43 The of the ozone layer affects the environment
A destroy B destruction C destructive D destroyer VII SPEAKING
44 Tom : “ _” – Daisy: “ Not now, but I used to” A Do you watch TV very often? B What’s your favourite colour? C Did you enjoy it? D Are you going to bed?
45 Mary: “What are you going to this weekend?” - David: “ _.” A I don’t like going out B I plan to visit my grandparents
C I’m tired D It’s a good idea
46 John : “ Remember to return the newspaper to my father ?” – Bob : “ “ A Not at all B I will C I’m sorry D Why not 47 A: “ How long does it take to get to the supermarket from your house ? “ – B: “ ”
A Ten minutes B It’s a short way
C About five kilometers D Since yesterday 48 - A: “Do you have a dictionary?” - B: “ ” A Yes, I B Yes, I have it
C Yes, I certainly have D Yes, thanks VIII ERROR RECONITION
49 We can’t go to Jullia’s party because of we’re going away that weekend A B C D
50 Last week unless my mother had had enough money, she would have bought that toy for me A B C D
51 It’s often takes me about fifteen minutes to go to work from here by foot A B C D 52 He is known that these questions are so difficult that he can’t answer them A B C D
IX READING:
Read the passage carefully and choose the best answer for each of the following questions
(9)We have cut down so many trees that there are now vast areas of wasteland all over the world As a result, farmers in parts of Africa cannot grow enough to eat In certain countries in Asia there is too little rice Moreover, we not take enough care of the countryside Wild animals are quickly disappearing For instant, tigers are rare in India now because we have killed too many for them to survive However, it isn’t enough simply to talk about the problem We must act now before it is too late to anything about it Join us now Save the Earth This is too important to ignore
53 The seas and rivers nowadays A cannot be swum in
B are less dirty than they used to be C are dirty enough to swim in D are contaminated
54 Smoke _
D is harmful to health B is full of the big cities
C causes an healthy life A makes life in big cities difficult 55 In one well-known city, traffic policemen have to wear oxygen masks A in order to protect themselves from being injured
B because there are so many cars on the streets C in spite of poisonous gases
D because of air pollution
56 Wild animals are A in danger of extinction
B being protected from natural environment
C killed so many that they cannot live in the forests D so rare that they cannot survive
57 What's the best title for the passage?
A Conservation B Protect the Natures!
C Save the Earth! D The Environment
X CLOZE TEST
Read the passage carefully and choose the word that best fills in each blank
Wild animals play an important part in the (59) of nature and supply us with many important products Birds and other small animals help (60) insects Wild animals provide food and hobby too Furthermore, they (61) our surroundings more interesting Uncontrolled hunting has destroyed a lot of wildlife and people have also harmed animals such as the passenger pigeon which disappeared completely Others including the whooping cranes, the blue whale and the American alligator are in danger of dying out Sometimes it is necessary to keep animals from (62) too plentiful For example, rabbits and rodents such as ground squirrels and mice may cause (63) _ damage to crops if they are too abundant Predators help hold down the population of their prey
58 A world B balance C activity D appearance
59 A control B delete C develop D remove
60 A B let C make D change
61 A developing B reaching C becoming D changing
62 A great B too C big D.also
XI WRITING
(10)The book ……… They studies English every day
English ……… My father waters the flowers every morning
The flowers ……… The waiter brings me this dish
I ……… They grow rice in the north
Rice ……… He is planting some trees now
Some trees ……… Her mother is preparing the dinner in the kitchen
The dinner ……… Somebody is singing my favorite songs now
My favorite songs ……… I’m looking for my dog
My dog ……… 10 Someone is sweeping the floor
The floor ……… UNIT 11: NATIONAL PARKS- GRADE 10 - Ai Ban
I LISTENING: U11
Listening: Listen to the CD and choose the best answer A, B, C or D
Cuc Phuong, the first (1) park in Vietnam, was officially opened in 1960 It is located 160 km south west of Hanoi spanning Ninh Binh, Hoa Binh and Thanh Hoa provinces The 200 square kilometre park attracts (2) and scientists alike In 2002, nearly 100,000 visitors made their way to Cuc Phuong Many come to see the work being done to protect (3) species According to scientists, there are about 2,000 different (4) of flora and 450 species of fauna
Cuc Phuong National Park has many caves Quen Voi, also part of the park, is where Nguyen Hue’s army was stationed before it made its surprise attack on Thang Long and defeated the Qing invaders in the (5) of 1789
1 A international B national C optional D cultural A scientists B visitors C tourists D visits
3 A rare B risk C endanger D endangered
4 A species B pieces C kinds D slices
5 A swing B spring C king D winter
II PRONUNCIATION :
1 A played B lived C hoped D endangered
2 A studied B opened C increased D threatened
3 A invader B destroy C spend D soldier
4 A nature B toxic C plant D contain
5 A missed B rained C called D moved
III STRESS :
1 A abandon B butterfly C wilderness D national
2 A fauna B ethnic C explore D orphan
3 A minority B recognize C survival D dependent A tropical B establish C October D dependent A temperate B chemical C habit D locate IV TENSE :
1 If you had something to eat now, you hungry A Wouldn’t have been B wouldn’t be
C Would be D would have been
2 If Mary _ a seat belt, she wouldn’t have been injured in the crash A hadn’t been wearing B had been wearing
C was wearing D hadn’t worn
(11)A knew-would wake B had known-would have woken C would have known- had woken D knew- woke
4 If Mr Black weren’t late every day, he _ his job
A wouldn’t lose B wouldn’t have lost
C would lose D won’t lose
5 Would Tim mind if I his bicycle without asking him?
A had borrowed B borrow C will borrow D borrowed V PREPOSITION:
1 The charity is totally dependent _ money from the public
A from B in C upon D with
2 November is suitable _ visiting Cuc Phuong national park
A to B for C with D about
3 Tourists go there to study butterflies, visit caves, hike mountains and look _the 1,000-year-old- tree
A for B over C at D up
4 Naibori National Park is kenya’s smallest park, but you may be surprised the large variety of animals that live there
A at B with C about D for
5 Oh, I’d be very interested _knowing more about your services
A on B in C of D with
6 It’s important to protect your skin the harmful effects of the sun
A from B of C for D with
7 Almost ethnic minorities in my country live mainly _ farming
A in B about C with D on
8 Apricot blossom usually blooms Spring
A on B in C for D of
VI SYNONYM :
1 The ethnic minority depend on a good harvest for their existence
A believe B recognize C rely D hire 2 At what time will the conference be over?
A spread B ended C lasted D begun
3 Young people like to go hiking in the mountain, especially in spring when the weather is fine A particularly B eventually C gradually D nearly
4 Cuc Phuong is the first of Vietnam’s nine national parks to be established A found B built C set up D organized 5 Why would November be a suitable time to visit Cuc Phuong National Park?
A match B fit C adaptable D appropriate 6 Local communities are campaigning against the dumping of toxic waste
A dangerous B unpleasant C unknown D poisonous 7 These plants only grow in the temperate zone
A region that has mild climate B region that has cold climate C region that has dry climate D region that has very hot climate 8 The Grand Hotel was conveniently located in the center of the city
A built B remaining C situated D visited 9 The boy was left as an orphan at the age of five
A a child who is illiterate B a child whose parents are dead C a child who is abandoned by parents D a child whose parents are separated 10 This contamination has threatened the park and many of the animals in it
A Endangered B danger C dangerous D endanger VOCABULARY :
1 My home village is _ 40 kilometers north of the capital
A Held B laid C located D surrounded
(12)A Means B sorts C tyres D species This has threatened many of the animals in this park
A population B remain C increase D contamination A new institution has been in the area to investigate the cause of the disease
A Established B covered C completed D laid One species can depend on another for _
A landing B saving C survival D existing VII WORD FORM :
1 She’s a known columnist
A National B nationally C nation D nationality There are toxic level of _ in the water of this lake
A Chemists B chemistry C chemicals D chemics Ms White is a very _ young woman
A Attract B attractive C attraction attractively The fertilizers and pesticides used on many farms are the water supply
A polluting B polluted C pollutant D pollution They _ the shopkeeper with a gun
A Threatening B threatened C threat D threateningly VIII SPEAKING
1 Hoa: Have you made any vacation plans? Lan: _
A That’s great! B No, May be I will go hiking C No, I haven’t decided yet D Yes, I will leave soon Tom: ”- £ 500 is too expensive.” - Peter: “ _“
A I agree B I hope not C Not many D Why not? Lan: “How long did the journey take? ”- Nam: “ _”
A About 500 kilometers B Last week
C Almost hours D The last two weeks
4 Tom : “ Would you like to have dinner with me?” - Daisy: “ _”
A Yes, I’d love to B I’m very happy C Yes, It is D Yes, so I David: “ Shall we leave now?” - Helen: “ _ ”
A Ok, let’s not B Have you got time? C Near the station D I would like to stay IX ERROR REGCONITION :
1 Before the final decision is reached , the various possibilities should discussed by the whole team A B C D
2 We could give you a lift if we’d known you were coming this way A B C D
3 Virgin Island National Park features an underwater preserve with coral reefs and colorfully tropical fish A B C D
4 If I were you, I would have forgotten about buying a new car A B C D Unless Mary doesn’t work hard, she will fail in the exam
A B C D X READING:
(13)at Yellowstone Visitors can check a schedule to see the exact time that Old Faithful is going to erupt There are many other geysers and boiling springs in the area Great Fountain Geyser erupts every 11 hours Excelsior Geyser produces 4,000 gallons of boiling water each minute! Boiling water is 100 degrees Celsius, or 212 degrees Fahrenheit – that’s very hot! People also like to see the Grand Prismatic Spring It is the largest hot spring in the park It has many beautiful colors The beautiful colors are caused by bacteria in the water These are forms of life that have only one cell Different bacteria live in different water temperatures Visiting Yellowstone National Park can be a week–long vacation or more It is beautiful, and there are activities for everyone
1 What is Yellowstone?
A A park B A geyser C A mountain D A hot spring Old Faithful is a _
A river B trail C passage D geyser Something predictable is something _
A people enjoy B people talk about
C people know in advance D people pay for in advance The largest hot spring in the park is _
A Excelsior B Old Faithful C Great Fountain D Grand Prismatic What causes colors in the springs?
A sunlight B bacteria C eruptions D temperatures XI CLOSED TEST:
National parks are managed primarily for public recreation, (1) _ exceptional locations where visitors can view wildlife and enjoy the (2) _ Generally, these protected public lands are off-limits to hunting, livestock grazing, logging, mining, and other (3) _ that exploit natural resources Some parks commemorate significant historical events (4) _, Gettysburg National Military Park (1895) in Pennsylvania (5) _ the 13 sq km (5 sq mi) site of the pivotal battle in the American Civil War (1861-1865)
New vocabulary:
- off-limits (adj.- after verbs): (thuộc vùng đất) cấm vào - livestock (n.): vật nuôi, thú nuôi
- to commemorate (v.): kỷ niệm, tưởng nhớ - pivotal (adj.): then chốt, mấu chốt, chủ chốt
1 A giving B providing C sending D throwing
2 A joy B fun C outdoors D indoors
3 A things B activities C people D animals A In fact B Moreover C However D For example
(14)(15) job look