题目内容
It’s foggy today. I’m not sure the highway will close soon. Let’s set off earlier.
| A．whether | B．when | C．how | D．why |
A
解析试题分析：句意今天有雾。我不知道是否高速公路不久就会关闭。让我们早点动身。A. whether 是否； B. when 什么时候；C. how 怎样；D. why为什么；故选A。
考点：考查引导词的用法。
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