Learning to write is learning to think. You don’t know things clearly you can writethem down.A. unless B. if C. since D. whether 题目和参考答案——青夏教育精英家教网—

题目内容

Learning to write is learning to think. You don’t know things clearly _________ you can write

them down.

A. unless B. if C. since D. whether

【解析】

试题分析：句意：学习写作就是学习思考。你不能清楚地知道事情除非你可以把他们写下来。Unless除非；if如果； since从；whether是否。所以选A。

考点：考查连词。

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