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五、巧妙运用“排除法”，既方便又快捷
有时四个选项中一眼扫过去，会发现有三个是不可能的，这时采用“排除法”是最明智不过的。
With a lot of difficult problems ______， the newly-elected president is having a hard time.
A. settled B settling C. to settle D. being settled
析：既然“新总统现在的日子不好过”;“许多问题需要去解决”即发生在将来应用不定式，排除其余选项，正确答案为C。
六、采用“还原法”，再现庐山真面目
有些句子设题上具有一定的隐蔽性和迷惑性，原因是它已改变了原先的句式或省去了一些内容，使我们从表面上不容易辨别出其句型结构，增加了理解的难度。这时巧妙使用“还原法”能大大降低句子的难度，使人豁然开朗，茅塞顿开。
1、The more he thought about it, the more questions he thought of_____.
A. to be asked B. being asked C. asking D. to ask
析：此题用介词“of”设陷阱，受定势影响会误选 -ing形式，但若能把后面部分还原为“he thought of more questions to ask”， 就能断出正确答案为D。
2. ---Can I help you ?
---Yes, please. Do you have any books on cooking?
---There are only a few, _______.
A. if any B. if have C. if some D. if do
析：最后一句为省略句，补充完整为“......， if there are any.”，得知正确答案为A。
