21. We have reached the point _____ we must ______ choices, or we will fail.

A. when, make　　 B. where, make　　 C. that, do　　 D. which, do

20. When the spaceship was in space, _____ new-looking earth appeared before us, _____ that we had never seen before.

A. a; one　　 　B. the; it　　 C. a; the one　　 D. the; one

19. --Who’s the greatest man ______?

--Sorry, I don’t know.

A．living　　 B．lives　　 C．lived　　 D．alive

18.We suggested that he _____right away.

A．must stop smoking　　 B．stopped smoking　

C．stop smoking　　　　 D．should stop to smoke

17. We ______ have lived through the war without your help.

A. couldn’t　　 B. may not　　 C. shouldn’t　　 D. mustn’t

16. --Can I help you, sir?

--I’d like to buy a TV set.

--This way, please. We have many types for you ____.

A. to choose　 B. to choose from　 C. choose　 D. to buy

15．I wonder if Spanish is hard______.

A. to learn　　 B. to be learned　 C. learning　 D. being learned

14．--Hi，Trancy，you look tired.

--I am tired，I 　__　 the living-room all day.

A. painted　　 B. had painted　　 C. have been painting　 D. have painted

13．--There were already five people in the car，but they managed to take me as well.

--It 　_　 a comfortable journey

A. can’t　　 B. shouldn’t be　　 C. must have been　 D. couldn’t have been

12．They believed, and _____ did we, that these modern paintings collected in the Shanghai Art Gallery were as valuable as those in the Museum .

A. that　　　 B. which　　　 C. neither　　　 D. so