【題目】You have to explain ________ you were absent from school yesterday.

A. whatB. whichC. where D. why

【答案】D

【解析】

試題分析：考查賓語從句。句意：你不得不解釋昨天你為什么沒來上學(xué)。explain后面是賓語從句，賓語從句不缺主賓表，缺少原因狀語，用why。故選D。

【知識拓展】

What引導(dǎo)賓語從句是起雙重作用，既起引導(dǎo)作用，又在從句中作一個成分。I don’t know what I should do next.我不知道下一步應(yīng)該做什么。

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