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

A. hadn’t

B. didn’t have

C. weren’t having

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: When they had to go, everybody ................. Nina and her mother for the party.

A. said

B. thanked

C. told

Câu 3: While we’re working on the project ourboss ................ on a beach in Greece!

A. will sit 

B. will have sat

C. will be sitting

Câu 4: From this graph we can see that theeconomy.................. at the moment.

A. improves

B. improve    

C. is improving

Câu 5: The teacher ............... us how to do theexperiment when the fire bell rang.

A. showed 

B. shown

C. was showing

Câu 6: My sister.................... economics andpolitics when she goes to university.

A. is going to study 

B. studies 

C. will study