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

A. showed

B. shown

C. was showing

Câu 1: ............. the experiment three timesnow with different results each time!

A. We’ve done

B. We did

C. We’ve been doing

Câu 2: 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 3: …………. i the doctor at 2.00 this afternoon so I can’t go to the lecture.

A. I’m seeingcorrect

B. I see

C. I will see

Câu 4: I..................want to be a practising doctor but now I’m more interested in research.

A. was used to

B. used tocorrect

C. would

Câu 5: They ................. personal computerswhen my father was a student.

A. hadn’t

B. didn’t have

C. weren’t having

Câu 6: She..................some friends to her house for a party.

A. decided

B. agreed

C. invited