【題目】________ the delayed flight will take off depends much on the weather.

A．Why B．When C．That D．What

【答案】B

【解析】

試題分析：考查名詞性從句的連接詞。句意：被延誤的航班何時起飛依天氣而定。題干中主句的謂語動詞為depends，為此前面是主語從句。Why在主語從句中做原因狀語；when在主語從句中作時間狀語；that在主語從句中不做任何成分；what在主語從句中作主語或賓語。根據(jù)語境判斷主語從句中缺少時間狀語，故選B項。

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