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Whether by accident or_____________, he arrived too late to help us.

A. purpose     B.aim        C. design      D. chance

C


解析:

purpose常与介词on, for或with连用。aim at “针对”;by chance“偶然地”与by accident同义。by design“蓄意地,有意地”。题意为:不知道是碰巧还是故意的,他到的太晚了,没能帮我们。根据句子逻辑。

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