Câu: 3. I think people will stay on the Moon for a short _ _ _ _ .
Câu: 6. This is a photo ... my relatives.
A. about B. to C. at D. of
Câu: 15. Your favorite food is fish. It means ....
A. you like fish very much
B. you would like some fish now
C. you hate eating fish
D. you never eat fish
Cau 17. They always help their mother _ _ _ _ their housework.
Câu: 18. The population of the world is always ... .
A. growing B. damaging C. destroying D. doing