18.　　 Millions of pounds have been spent ________ the free state education system in Britain.

A. to improving 　　　　 B. in improving 　　　　 C. to improve 　　　　　　　　 D. to have improved

17.　　 Some birds finally reach home by accidentally ________ landmarks which they recognize.

A. to come across　　　　 B. coming around 　　 C. coming across 　　　　　　 D. to come around

16.　　 They thought there is no trouble ________ their favorite brand from other brands.

A. to tell 　　　　　　　　　　　　　　　　　　　　　 B. telling

C. tell D. 　　　　　　　　　　　　　　　　　　　　 told

15.　　 -We don't allow anyone ________ here.

-Well, I hate to say it again. We don't allow ________ here.

A. to smoke; smoking

B. smoking; to smoke

C. to smoke; to smoke

D. smoking; smoking

14.　　 -What do you think made Mary so upset?

　 -________ her new bicycle.

A. As she lost 　　　　　　 B. Lost 　　　　　　　 C. Losing　　　　　　　　 D. Because of losing

13.　　 How about the two of us ________ a walk down the garden?

A. to take 　　　　　　　　 B. take 　　　　　　　 C. taking 　　　　　　　 D. to be taking

12.　　 -How do you deal with the disagreement between the company and the customers?

-The key ________ the problem is to meet the demand ________ by the customers.

A.　　 to solving; making

B.　　　 to solving; made

C.　　　 to solve; making

D.　　 to solve; made

11.　　 While shopping, people sometimes can't help ________ into buying something they don't really need.

A. to persuade 　　　 B. persuading 　　　 C. being persuaded 　　　 D. be persuaded

10. After 10 years in prison, he was given his ________(自由).

9. The two students ________ (相互交流)greetings when they met.