问题

The vase cost me almost 100 yuan—Well, it was crazy of you to spend so much money _____you could buy a much cheaper one
A:while
B:if
C:because
D:when
B:if
C:because
D:when
正确答案是:
同类题型
His plan was such a good one _____ we all agreed to accept it[ ]
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If we can ____ our present difficulties, then everything should be all right.
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