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

A. We’ve done

B. We did

C. We’ve been doing

Câu 1: The teacher..................... us how to do the experiment when the fire bell rang.

A. showed

B. shown

C. was showing

Câu 2: Nina was very............... because she got lots of present

A. interesting

B. lovely

C. happy

Câu 3: I don’t know whether to accept the joboffer. It’s .................

A. a difficult decision

B. the difficult decision

C. difficult decision

Câu 4: 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 5: My sister.................... economics andpolitics when she goes to university.

A. is going to study 

B. studies 

C. will study

Câu 6: Most university students.................. on campus in their first year.

A. lives

B. livecorrect

C. are living