—Howlongdoesittaketogettotheairport?—Fortyminutes.Butit...

问题详情：

—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

【回答】

A

知识点：连词

题型：选择题