选择题：I don’t understand ____ believe him.( )(本题2.0分)A.

题目内容：

I don’t understand ____ believe him.( )(本题2.0分)
A. why don’t you
B. why you not
C. why you don’t
D. why not you

参考答案：

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—David, could you tell me _________?( )—Every four years.(本题2.0分)A. when the 201

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