The question of______the traffic accident happened hasn’t been answered yet, though the police have made on-the-spot investigati

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问题 The question of______the traffic accident happened hasn’t been answered yet, though the police have made on-the-spot investigation.

选项 A、that
B、whether
C、how
D、whenever

答案C

解析 of是介词。介词后面若加宾语从句，必须是特殊疑问词开头的宾从。从意思上来讲，是“如何(how)发生”，而不是“是否(whether)发生”。

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英语

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