1 . Some old people can use the computer now, but they________ ten years ago.

A．couldn’t

B．mustn’t

C．needn’t

D．shouldn’t

2 . —If I wasn’t busy, I could have been back by 5: 30 o’clock.
—What a pity! She ______ here to see you.

A．is

B．was

C．had been

D．has been

3 . He________the teacher into the classroom,________some other students.

A．followed; closely followed by	B．following; closely followed
C．followed; closely following	D．following; close followed

5 . I have known Dr. John for a long time, maybe since Bet ___________in that university.

A．worked

B．works

C．has worked

D．had worked

7 . The book __________ into thirty languages since it __________ on the market in 1973.

A．has translated, came	B．was translated, has come
C．has been translated, came	D．has been translated, has come

8 . Mr. Black is going to marry a girl he ________ in Japan last year.

A．meets

B．has met

C．met

D．would met

9 . --- Could you tell me where you’re working now, Tony?
--- In the new development zone. But I ________ in a computer company for five years.

A．have worked

B．had worked

C．was working

D．worked

10 . Only when he told me the news ________ what had happened.

A．I know

B．I knew

C．did I knew

D．did I know