( )11. Mother kept inviting Mrs. Smith to stay for lunch， and finally she _______.

　　A. gave out

　　B. gave off

　　C. gave in

　　D. gave away

　　( )12. <<<>>> is ________ only European country I have visited.

　　A. an

　　B. a

　　C. the

　　D. 不填

　　( )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