题目内容

【题目】I don’t understand ______ such a silly question in class yesterday.

A. why did John ask B. why John asked

C. why is John asking D. why John asks

【答案】B

【解析】

句意：我不明白为什么约翰在昨天课上问了那么傻的一个问题。宾语从句用陈述句语序，而AC项为疑问句语序，故排除。主句是一般现在时，从句根据需要选择时态，根据yesterday，可知从句用一般过去时，故选B

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