2.　 2.　 The robber told him that he had better keep silent ______ he wanted to get into trouble

a. if　　 b. unless　　 c. otherwise　　 d. whether

1.　 1.　 I’d get it for you ______ I could remember who last borrowed the book.

a. on condition that　　 b. now that　　 c. except that　　 d. considering that

21.AD 22. CD　 23.AC24.CA 25.BA 26.DC　 27.DC 28.CA 29.BA 30. BC

12.AC 13. CB(A)B 14.DA 15.BCD 16.DA 17.BA 18.AD 19.BD 20.CA

30. 1)_____ on the stone, you will see much farther.

　 2) _____on the stone, and you will see much farther.

　　　 A. To stand　 B. Standing　 C. Stand　 D. Stood

Key.　 1 BDA 2.DCB 3.ABD 4.BDA 5.BD 6.BD 7.BCA 8.AD 9. AB　 10.AB 11CB

29. 1) I don’t know _____ you are getting on well with your work.

　 2) I don’t know _____ you are getting on with your work.

　　　 A. how　　 B. that　　　　　 C. which　　 D. because

28. 1) Tom, ____sure to be here on time.

　 2) Tom _____sure to be here on time

　　　　 A .is　　　 B. are　　　　　 C. be　　　　　 D. am

27.1) The boy was crying _____ the cup broken.

　 2) The boy was crying ____ the cup was broken.

　　 A. since　　 B. for　　　　　　 C. because　 D. with

26. 1) Only those _____ knew well could be let in.

　 2) Only those ____ he knew well could be let in.

　 A. did he　　　 B. he did　　　 C. who　　　 D. he

25. 1) Mary was ill, ____ made her mother worried.

　 2) Mary was ill and _____ made her mother worried.

　　 A. it　　　　　 B. which　　　　 C. these　　 D. those