---Howlongdoesittaketogettotheairport?     ---Fortyminu...

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 close 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