1. Three-fourths of its surface of the earth ______ sea.
A．is
B．have been
C．are
D．was

2. _______ pleased with his homework.
A．His both parents are
B．His parents are both 
C．All his parents are
D．His parents are all

3. At no time and under no circumstances _______ his personal interest first.
A．should a munist place
B．His parents are both 
C．a munist should place
D．shouldn’t a munist place

4. They stopped ______, but there was no sound．
A．hearing
B．listening
C．to hear
D．to listen

5. It is said that he likes to carry a raincoat ________.
A．where he goes
B．wherever he goes 
C．where he goes to
D．wherever he goes to

6. _______, our experiment would have failed．
A．Should he not help us
B．Did he not help us 
C．Had he not helped us
D．If he has not helped us

7. It must have been _______ who gave the signal.
A．them
B．they
C．theirs
D．these

8. With the help of science and technology, the farmers produced _______ crops in 1993 as the year before.
A．as twice as many
B．as many as twice 
C．as twice many
D．twice as many

9. It was such a hot day that everyone ______ swimming in the river.
A．felt like
B．tended to
C．made for
D．turned out

10. They arrive _______ late that there were no seats left.
A．much
B．too
C．so
D．very

11. Twenty _____ people were present at that meeting.
A．thousands
B．thousands of 
C．thousand of
D．thousand

12. Many children are looking forward to ______ a trip to Beijing next month.
A．make
B．be making
C．making
D．have made

13. Let’s go, Mary. It’s time we _______.
A．attend the meeting
B．attended the meeting 
C．will attend the meeting
D．should have had the meeting

14. Like the old, ______ respected in some countries.
A．the female is
B．a female are 
C．a female is
D．the female are

15. I tried to get out of the business, ______ I found impossible.
A．who
B．which
C．that
D．what

16. He is unable to answer the questions about the new text. He ______ it yesterday.
A．must have previewed
B．ought to preview 
C．ought to have previewed
D．should preview

17. I _______ to go swimming in the pool when I was a boy. I often go fishing in the pool now.
A．was used
B．used
C．would use
D．had used

18. When I was away from home, he pletely fot ______ the plants as he promised to do.
A．watering
B．to water
C．that he watered
D．so as to water

19. “Thank you for your perfect control. Without you, ________,” said the host.
A．we’d be attacked by the cobra
B．we should be attacked by the cobra
C．we would have attacked by the cobra
D．we would have been attacked by the cobra

20. We are aware that, _______, the situation will get worse.
A．if not dealing with carefully
B．if dealt not carefully with
C．if not carefully dealt with
D．if not carefully dealing with