21.(2010·合肥模拟)-How much should I pay for the ice cream?　

-Oh, no. It’s my ______.

A. choice　　　 B. treat　　　 　 C. present　　　 D. charge

20.(2010·合肥模拟)She had prepared carefully for her CET-4 examination so that she could be sure of passing it at her first ________.

A. purpose　 　　 B. attention　　　 C. desire　　　 D. attempt

19.(2010·合肥模拟)As is well-known, the brain performs a very important _______，which controls the nerve system of the body．

A. motion　 　　　　B. action　　 　C. function　　 　　 D. fact

18.(2010·安庆模拟)The sweater that my mum made was twice the ______ it should have been. A. quantity　　 　　B. size　　　　 C. number　　　　 　D. quality

17.(2010·安徽名校联考)Her team failed in the competition．She is trying to get to the ____ of why some

members gave up midway．

A．bottom　 　　B．floor 　　 C．result　 　 　　D．effect

16.(2010·安徽名校联考)Duffield White, _____ of Russian at Weslevan University, said that he was one of the youngest winners of the prize．

A．professor 　 B．a professor 　　C．the professor　 　D．one professor

15．(2010·蚌埠模拟) With so many programs ____ online for free, there is no excuse not to make use of them.　

A. available 　　　B. acceptable　 　　C. approachable 　　　D. movable

14.(2010·长沙模拟)AIDS is spreading all over the world at shocking speed. Where its dark _______ appears, we see pain, tears and death.

A. shape　　 　　 　B. shadow　　 　　C. ambition　 　　　D. feeling

13.(2010·长春模拟)What a wonderful ________ that they are working hard!

A. scene　　 　B. sight　 　 C. view　　 D. seeing

12.(2010·福州模拟)Not having a good ___________of English can be a serious obstacle to achieving your goals.

A. demand　 　　B. appreciation　　　 C. experience　　　 D. command