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

A. showed 

B. shown

C. was showing

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: I finished my essay yesterday but ………. it in to the tutor yet.

A. I’ve given

B. I haven’t givencorrect

C. I didn’t give

Câu 3: She................ well at school but that changed when she became friends with a different group of girls.

A. did

B. had done

C. had been doing

Câu 4: 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 5: Nina was very............... because she got lots of present

A. interesting

B. lovely

C. happy

Câu 6: The teacher..................... us how to do the experiment when the fire bell rang.

A. showed

B. shown

C. was showing