题目内容
20.________ the delayed flight will take off depends much on the weather.( )A. | Why | B. | When | C. | That | D. | What |
分析 被延误的航班何时起飞依天气而定.
解答 答案:B.
题干中主句的谓语动词为depends on,因此前面是主语从句.Why在主语从句中做原因状语;when在主语从句中作时间状语;that在主语从句中不做任何成分;what在主语从句中作主语或宾语.根据语境判断主语从句中缺少时间状语,故选B.
点评 本题考查主语从句,要掌握引导词的用法和根据语境选择恰当的连接词.

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