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    【题目】You are supposed to be more careful to make fewer ______ while you are writing.

    A. trouble B. matter C. mistakes D. problems

    【答案】C

    【解析】分析：句意：你写的时候应该更仔细，少犯错。A. trouble麻烦，烦恼；B. matter事情，麻烦事；C. mistakes错误；D. problems问题，难题。fewer修饰可数名词的复数形式，A、B错。make mistakes犯错；make problems制造麻烦。根据语境，书写时“犯错”，故选C。

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