—It cost me 30 yuan to get here. —Well it was crazy of you to take a taxi you could come

问题补充：

—It cost me 30 yuan to get here.

—Well, it was crazy of you to take a taxi you could come by bus as well.

A. while

B. if

C. when

D. because

答案：

A. while

B. if

(答案→)C. when

D. because

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