unit 15 va bai tap

... b/ reduced c/ recycled 43 How many ………………do you celebrate in your country ?a/ festivals b/ festival c/ festivanl 44.I can see a boy……….a water buffalo A ride B.riding C.to ride D.rode 45 Would ... country with hills and mountains a Highland b Reef c Valley d Bay 14 Please _ the TV before you go to bed a plug b unplug c turn out d come out of 15 He took the early flight London a for b toward...

Ngày tải lên: 15/06/2015, 08:00

... Answer key (Unit 15+ 16) d 10 D 19 B 28 C 37 A 46A d 11 B 20 B 29 B 38 D 47B c 12 A 21 B 30 B 39 C 48D d 13 C 22 C 31 D 40 C 49D c 14 D 23 C 32 C 41 C 50B B 15 C 24 B 33 C 42 A 51B D 16 C 25 B 34

Ngày tải lên: 27/05/2015, 15:13

... n lư t là: A CH3-CH2-CH2OH, CH3-CH(OH)-CH3 B CH3-CH(OH)-CH3,CH3-CH(OH)-CH2-CH3 C CH3-CH(OH)-CH3, CH3-CH2-CH2OH D CH3-CH(OH)-CH2-CH3, CH3-CH2-CH2OH 91 Cho dãy bi n hoá sau: Buten-1 +dd NaOH, t0 ... Butanol-2 H2SO4,0đ c (Y) 170 (S n ph m chính) Trong dãy bi n hoá trên, ch t (X), (Y) có CTCT l n lư t là: A CH3-CH2-CH2-CH2Cl, CH3-CH=CH-CH3 B CH3-CHCl-CH2-CH3, CH3-CH=CH-CH3 C CH3-CH2-CHCl-CH3, ......

Ngày tải lên: 23/10/2013, 20:15

... B4.Giải (*) Phản ưngù: CnH2n+1OH H2SO4đ to=140 (CnH2n+1 )2O + H2O (1) (1) ⇒(B): (CnH2n+1 )2O Theo đề ta có: dB/A= MB = 1,7 MA (14n + 1).2 +16 14n +18 n=3 = 1,7 Vậy :(A):C3H7OH ; (B): C3H7O-C3H7 ... ĐặT CTTQ (A): CnH2n+1OH Phản ưngù: CnH2n+1OH H2SO4đ to=170 CnH2n + H2O (1) (1) ⇒(B): CnH2n Theo đề ta có: dB/A= MB = 0,7 MA 14n = 0,7 14n +18 n=3 Vậy :(A):C3H7OH ; (B): CH3-CH=CH2 p dụng 4: Đun

Ngày tải lên: 28/10/2013, 20:15

... said/ told) the class a funny story d Did you ( say/ tell) Sally is coming with us? e "Don't ( say/ tell) lies! ( said/ told) Jame angrily f How old were you when you learned to ( say/ tell) the ... secrets j " Do you think anyone saw us?" She ( said/ told) nervously X Choose the word thar has the underlined part pronounced differently from that of the others (2 marks) a carve b warm c farm d...

Ngày tải lên: 29/04/2015, 18:00

... never had sucha terrible experience a go b to go c a unfortunately b luckily c certainly d daily a bore b bored c boring d boringly a go b going c to go d to going a me b my c mine d myself a ... midday 10 Smoking is generally recognize as one of the major causesof heart disease Ex Chọn a, b, c, d để điền vào chỗ trống thích hợp I have always wanted (1)…………… fishing On the last day of my va...

Ngày tải lên: 29/04/2015, 18:00

... 18 The police have arrested five suspects 19 The doctor ordered him to take a long rest 20 Lightning struck the house Unit 10: I-Grammar: ... the leaky faucet 10 Someone has changed the name of this street 11 Elias Howe invented the sewing machine in 184 5 12 The librarian ... housework ……………………………………………………………………………… 17 my mother had written the letter before 1 985 ………………………………………...

Ngày tải lên: 29/04/2015, 18:00

... studying very …………… a hardly b harder c hard 16 You should cool the burn ……………… a immediate b.immediately c immediating 17 What time ……….Maria be her? a will b shall c is 18 She will be here ………… ... Eyepiece d Eye chart Leave the victim …………… flat and don’t let him …………chilled a lying/to become b to lie/ become c lying/ become d to lie/ to become He broke his legs, so he has to use a(an)………...

Ngày tải lên: 29/04/2015, 18:00

... everyday.” 12 She said :” We should read this sentence more carefully, Hung.” 13 “You should prepare your lesson before going to school, Na.” Tam said ... them his, her their their his, her theirs theirs Gián tiếp That Those There Then/ at one/ immediately Before That day That night Tomorrow Yesterday Last night/ week/ month/ year The next/ following ... free time to enjoy themselves is ver...

Ngày tải lên: 22/05/2015, 23:00

... …………, after ten minutes , dark clouds began to appear A Unfortunate B Unfortunately C Unfortunated D Unfortunatedly 18* .While my mother ……… dinner, my father came home from work A, cooked B cooking ... expensive 14) The Robinson family / making / preparation / Tet 15) You / mind / if / wait / me / moment? 16) Who / man / waiting outside? 17) There / some children / swim / the river 18) You...

Ngày tải lên: 22/05/2015, 23:00

... quay lại/ quay trở mang theo rơm Cuối cùng, vào cuối Ngớ ngẩn,ngu ngốc Tham lam Đạo đức Bài học đạo đức LANGUAGE FOCUS A PREPOSITION OF TIME (GIỚI TỪ CHỈ THỜI GIAN): In + năm/ mùa ( in 2006/ ... A in b.on C at D by th 12 My birthday is _May 28 A in B at C on D by 13 They came here _8a.m and 9a.m A at B before C after D between 14 Springs come _ summers A at B before C after ... blank spac...

Ngày tải lên: 03/09/2015, 16:57

... thể tích khí hỗn hợp : A 20% oxi ; 80% ozon B 50% oxi ; 50% ozon C 40% oxi ; 60 % ozon D 66 ,67 % oxi ; 33,33% ozon Câu 36 : Phân tích chất X người ta nhận thấy có 40% S 60 % O khối lượng X : A SO2 ... định khơng nói khả phản ứng oxi ? A Oxi tác dụng với tất phi kim B Oxi tham gia vào q trình cháy , gỉ , hơ hấp C Những phản ứng mà oxi tham gia phản ứng oxi hóa khử D Oxi...

Ngày tải lên: 14/08/2012, 10:34

Ngày tải lên: 16/08/2012, 09:03