_______ is reported in the newspaper, talks between the two countries are making progress.

A．It

B．That

C．As

D．Which

在窗体上画一个名称为Command1的命令按钮和一个名称为Text1的文本框，然后编写如下程序： Private Sub Command1 Click() Dim x， y， z As Integer x = 5 y = 7 z = 0 Text1.Text = " " Call P1(x， y， z) Text1.Text=Str(z) End Sub Sub Pl(ByVal a As Integer， ByVal b As Integer， c As Integer) c = a + b End Sub 程序运行后，如果单击命令按钮，则在文本框中显示的内容是

A．0

B．12

C．Str(

D．没有显示