( )13. The problem of pollution in this city is more serious than ______ in other cities.

　　A. that

　　B. it

　　C. this

　　D. those

　　( )14. Dick found himself walking _______ the direction of the post office.

　　A. to

　　B. by

　　C. along

　　D. in

　　( )15. _______ that we were late， we started to run.

　　A. Know

　　B. To know

　　C. Knowing

　　D. Being known

　　( )16. This room is _______ any of the others in the building.

　　A. the biggest than

　　B. big as

　　C. bigger than

　　D. the biggest of

　　( )17. Just think Ann got the house _______ all by herself!

　　A. paint

　　B. be painted

　　C. to paint

　　D. painted

　　( )18. The policeman caught the man _________ the arm.

　　A. by

　　B. with

　　C. on

　　D. at

　　( )19. To get an education， _______.

　　A. one must work hard

　　B. working hard is important

　　C. to work hard is necessary

　　D. it is needed to work hard

　　( )20. The old man could not decide ________ the money or to put it in the bank.

　　A. if he spent

　　B. whether to spend

　　C. that he spent

　　D. what to spend

　　( )21. I wish you‘d consider _______ to Miami with us this vacation.

　　A. going

　　B. that you‘ll go

　　C. to go

　　D. to going

　　( )22. I think I‘ll wait until the mail _______.

　　A. should come

　　B. is coming

　　C. comes

　　D. will come

　　( )23. We found ________.

　　A. the work hard for doing

　　B. hard to do the work

　　C. it hard for doing the work

　　D. the work hard to do

　　( )24. Professor Bixby warned his students ________ late for the examination.

　　A. not be

　　B. to be not

　　C. not to be

　　D. be not

　　( )25. I don‘t know what I’d have done if I _______ to make that decision.

　　A. would have

　　B. had had

　　C. have had

　　D. did have

　　参考答案：

　　1.C 2.C 3.C 4.D 5.D 6.A 7.D 8.B 9.C 10.C

　　11.C 12.C 13.A 14.D 15.C 16.C 17.D 18.A 19.A 20.B

　　21.A 22.C 23.D 24.C 25.B