【題目】It's foggy today. I'm not sure _______ the highway will be closed soon.

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

【答案】A

【解析】

試題分析：句意：今天是霧天。我不確定高速公路一會(huì)兒是否會(huì)關(guān)閉。分析選項(xiàng)：whether是否；when當(dāng)什么時(shí)候；how如何；why為什么。通過(guò)句意為是否之意。故選A

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