1 . Ladies and gentlemen, please fasten your seat belts. The plane ________.

A．takes off

B．took off

C．is taking off

D．has taken off

2 . He’s got himself in a dangerous situation ______ he is likely to lose control over the plane.

A．when

B．that

C．which

D．where

3 . The number of people invited________ fifty, but a number of them________ absent for different reasons.

A．were; was

B．was; was

C．was; were

D．were; were

4 . —I am sure that Andrew will win the first prize in the final.
—I think so. He ________ for it for months.

A．is preparing

B．was preparing

C．has been preparing

D．had been preparing

5 . Many people who had seen the film were afraid to go to the forest when they remembered the scenes ______ people were eaten by the tiger.

A．in which

B．by which

C．which

D．that

6 . ________ from space, the earth, with water________ 70% of its surface, looks like a blue ball.

A．Seen; covered

B．Seen; covering

C．Seeing; covering

D．Seeing; covered

7 . Gun control is a subject________ Americans have argued for a long time.

A．of which

B．with which

C．into which

D．about which

8 . Now that Lucy was out of a job, she ______ going back to school, but she hasn’t decided yet.

A．had considered	B．has been considering
C．considered	D．is going to consider

9 . Although you ______ find bargains in London, it’s not generally a cheap place to shop.

A．should

B．need

C．must

D．can

10 . September 30 is the day ________ which you must pay your bill.

A．by

B．for

C．with

D．in