A man does not know the difficulty of anything______he does it personally.

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问题 A man does not know the difficulty of anything______he does it personally.

选项 A、although
B、if
C、because
D、unless

答案D

解析 人只有亲自去做的时候才知道事情有多难。考点:连词辨析。unless意为除非,although意为尽管,if意为如果,because意为因为。
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本试题收录于: 英语题库普高专升本分类
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