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

A. begins/ends

B. had begun/ended

C. has begun/had ended

D. began/ended

Câu 1: Ann is interested in.................... young children.

A. teach

B. teaches

C. to teach

D. teaching

Câu 2: Doctors _____ a cure to AIDS yet.

A. have found

B. found

C. haven't found

D. hasn't found

Câu 3: You shouldn't spend all your time.....................

A. study

B. to study

C. studying

D. studied

Câu 4: Homestead High School football team………….. a championship until last season.

A. has never won

B. had never been winning

C. is never winning

D. had never won

Câu 5: The news came as no surprise to me. I…………..for some time that the factory was likely to close.

A. knew

B. had known

C. have existed

D. exist

Câu 6: He _____ to give up smoking since last week.

A. was trying

B. have tried

C. has tried

D. tried