九、通过对比关系，锁定目标

　　句中如含有though\althought\but \however\while等表示对比关系的词时，我们就可根据前后的关系确定正答案。

　　1. They wanted to charge $5000 for the car, but we ______to bring the price down.

　　A. tried B. managed C. failed D. had

　　析：根据转折关系得知“设法做成了……”，故选B。

　　2.---I think George does't really care for TV plays.

　　---Right, _____ he still watches the program.

　　A. and B but C. or D. so

　　析：通过前后内容对比，“不喜欢看电视剧”与“仍然”是转折关系，故用but.

　　十、掌握固定句型，许多问题可迎刃而解

　　鼓励学生自己归纳在学习中常见的一些固定句式，这对于提高单选题的准确率及书面表达的规范性都有好处。如，“祈使句 +and\or + Sb. will ......”; “It +be +some time +before ......”;“It wasn't until......that......”等。

　　The flu is believed_____by viruses that like to reproduce in the cells inside the human nose and throat.

　　A. causing B. being caused C. to be caused D. to have caused

　　析：“Sth.\Sb. be said \believed to +V......”为固定句式，再结合“by”判断这里应用被动，故选C。