Câu hỏi: 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 1: He _____ to give up smoking since last week.

A. was trying

B. have tried

C. has tried

D. tried

Câu 2: She shouldn’t get married yet; she . . . . . . . . . . . . . . . . 

A. is not old enough

B. was not old enough

C. is not enough old

D. was not enough old

Câu 3: 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 4: Glenda…………..extremely hard when she was a student.

A. worked

B. has worked

C. was working

D. had been worked

Câu 5: He enjoys _____ in the rain.

A. walk

B. walks

C. to walk

D. walking

Câu 6: Doctors _____ a cure to AIDS yet.

A. have found

B. found

C. haven't found

D. hasn't found