Câu hỏi: When I got to the office, I ----------- that I had forgot to lock the door.

A. realized

B. had realized

C. realize

D. have realized

Câu 1: My daughter ------------- university last June.

A. left

B. has left

C. leaves

D. was leaving

Câu 2: Has your teacher ever ------------ angry with you?

A. get

B. getting

C. got

D. gets

Câu 3: -------------- study hard when you were at school?

A. Must you

B. Had you

C. Did you have to

D. Were you

Câu 4: When the phone rang she ------------ a letter.

A. writes

B. willl write

C. has written

D. was writing

Câu 5: She is tired because she ------------- all day.

A. is studied

B.  has been studying 

C. had been studying

D. studied

Câu 6: He often ------------ so nervous before his exams.

A. feels

B. felt

C. was feeling

D. had felt