24. The singer has lost her ringing ___ as a result of the bad cold.

　 A. tone　 B. voice　 C. sound　 D. tune

23.All possible means have been tried to ___ the Vietnamese of the infected bird flu.

　 A. treat　 B. deal　 C. cure　 D. operate

22. –Why hasn’t she set out for Beijing?

　 -She is ___ to have changed her mind.

　 A. probable　 B. possible　 C. likely　 D. surely

第一节 单项填空(共15小题；每小题1分，满分15分)

21. The old machine is not obviously adapted to the new production, so we must __

it.

　 A. reform　 B. advance　 C. improve　 D. develop

99.The host country took the trouble _________________(make) preparations for the coming sports meet.

98.I had no trouble _____________(find) his house.

97.I regret ___________ (say) I haven’t given you enough help.

96.The best time ____________(swim) is in summer.

95.He meant ___________(train) the boy to be a good swimmer.

94.The elephants ought ____________(feed) now by the keepers.