—How long does it take to get to the airport?—Forty minutes. But it's foggy today. I'm not sure the highway will closes soon. Let's set off earlier.

题型：单选题题类：常考题难易度：普通

—How long does it take to get to the airport?
—Forty minutes. But it's foggy today. I'm not sure the highway will closes soon. Let's set off earlier.

A、whether B、when C、how D、why

举一反三

- Forty minutes. But it's foggy today. I'm not sure _________ the highway will be closed soon. Let's set off earlier.

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