Câu hỏi: You shouldn't spend all your time.....................

A. study

B. to study

C. studying

D. studied

Câu 1: I…………..at the checkout when I………….. a strange-looking man.

A. waited/noticed

B. was waiting/noticed

C. waited/was noticing

D. was waiting/had noticed

Câu 2: Do you mind _____ up?

A. wash

B. washing

C. washed

D. to wash

Câu 3: No, you can’t go to holiday by yourself! You aren’t . . . . . . . . . . . . !

A. very old

B. too old

C. old enough

D. enough old

Câu 4: Fish were among the earliest form of life. Fish ………….. on earth for ages and ages.

A. existed

B. are existing

C. have existed

D. exist

Câu 5: Doctors _____ a cure to AIDS yet.

A. have found

B. found

C. haven't found

D. hasn't found

Câu 6: The World War II ………….. in 1939 and ………….. in 1945.

A. begins/ends

B. had begun/ended

C. has begun/had ended

D. began/ended