I don't understand______ believe him.[ ]

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问题选择题

I don't understand______ believe him. [ ]

A. why don't you

B. why you not

C. why you don't

D. why not you

答案

答案：C

单项选择题

文件之间最紧密的历史联系一般是指（）联系。

A、来源

B、内容

C、时间

D、形式

填空题

下列程序的输出结果是【15】。Private Sub Commandl Click() Dim a(1 To 20) Dim i For i=1 To 20 a(i)=i Next i For Each i ln a()a(i)=20 Next i Print a(2)End Sub