Câu hỏi: She ................ well at school but thatchanged when she became friends witha different group of girls.

A. did

B. had done

C. had been doing

Câu 1: I don’t know whether to accept the joboffer. It’s .................

A. a difficult decision

B. the difficult decision

C. difficult decision

Câu 2: They.......................personal computers when my father was a student.

A. hadn’t

B. didn’t havecorrect

C. weren’t having

Câu 3: Most university students.................. on campus in their first year.

A. lives

B. livecorrect

C. are living

Câu 4: ............. the experiment three timesnow with different results each time!

A. We’ve done

B. We did

C. We’ve been doing

Câu 5: For those of you new to the company, this leaflet is full of ...............

A. a valuable information 

B. the valuable information

C. valuable information

Câu 6: While we’re working on the project ourboss ................ on a beach in Greece!

A. will sit 

B. will have sat

C. will be sitting