... homework / before / play / table tennis enjoy / socialize / friends / and / cost / nothing see / what / characters / Vietnamese students / more vacations ... 4.Her friends bought alot of pictures in the aquarium Nga ate a lot of fish The end Answer keys: L7 I 2,5 ( trường hợp cho cho 0,5 đ) 1.A 2B 3B 4C 5.C II.2,5 ( trường hợp cho cho 0,5 đ) 1.B 2A 3.B ... homework before they play table tenis 3, She enjoied socializing with her friends and it cost nothing 4,We see what the characters 5,Vietnamese students have more vacations than American ones...