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3.  一How long does it take to get to the airport?

—Forty minutes. But it's foggy today. I'm not sure_________   the highway will be closed soon.

Let's set off earlier.

A. whether     B. when    C. how       D. why

3.   A考查宾语从句的引导词。由答语第二句句意"但是今天有雾"可知"我不确定高速公路是否很快会被关闭"。whether "是否";when "何时";how "如何"; why"为什么"。根据句意应选A。

题目来源:同步导学案课时练九年级英语上册人教版 > 单元复习课

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