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20.(　 ) China Mobile has to face the problem that more and more people in China prefer to choose　　　 　cheaper wireless phone service known as 　　　　　"Little Smart".

A. a; the　 　　　　　　　　　 B. a; /　　　　　　　　　　　　　 C. the; /　　 　　　　　　　 D. the; the

19.(　 ) - I don't feel like going out. Why don't we just stay home and watch TV instead?

- 　　　　　You promised to take me out for dinner and to the theatre on my birthday.

A. Great!　　 　　　　　　 B. Why me!　　　　　　　　　 C. Come on!　 　　　　　　 D. Not at all!

18.(　 ) Those people who 　　　　　were sent to the nearest hospital for treatment without delay.

A. injured　 　　　　　　　 B. got injured　　　　　　　 C. were being injured 　 D. are injured

17.(　 ) I couldn't 　　　　　her at once because she changed so much after these years abroad.

A. know　　　 　　　　　　 B. remember　　　　　　　　 C. see　　 　　　　　　　　　 D. recognize

16.(　 ) The trouble they now are faced with lies 　　　　　they have no money for the moment.

A. that　　 　　　　　　　　　 B. in that　　　　　　　　　　　 C. in the fact　 　　　　　　 D. in the fact that