Câu hỏi: When I arrived the lecture................ soI didn’t find it easy to follow.

A. started

B. had startedcorrect

C. had been starting

Câu 1: …………. the doctor at 2.00 thisafternoon so I can’t go to the lecture.

A. I’m seeing

B. I see.

C. I will see

Câu 2: 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 3: There aren’t ...............places left onthe course so you’d better apply soon.

A. much

B. many

C. lots of 

Câu 4: The teacher ............... us how to do theexperiment when the fire bell rang.

A. showed 

B. shown

C. was showing

Câu 5: ............. the experiment three timesnow with different results each time!

A. We’ve done

B. We did

C. We’ve been doing

Câu 6: I don’t know whether to accept the joboffer. It’s .................

A. a difficult decision

B. the difficult decision

C. difficult decision