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七、去掉插入语，化繁为简
有时设题特意加上插入语，使句型显得繁杂，这时只要去掉插入语，题干就简单明了，一目了然了。
---Is that the small town you often refer to?
---Right， just the one_____you know I used to work for years.
A.that B. which C. where D. what
析：去掉插入语“you know”就知道答案为C。
八、以逻辑为主线，敲定答案
留意非谓语动词与句子主语的逻辑联系能迅速圈定答案，如下题正确答案应为C。
While watching television， ________.
A. the doorbell rang B. a black cat suddenly ran in
C. we heard the doorbell ring D. an unexpected visitor came to visit me.
