— Which animal can't fly?

— A ______________ can't fly. [ ]

A. rabbit

B. bird

C. butterfly

D. bee

在窗体上画一个名称为Command1的命令按钮，然后编写如下程序：
Private Sub Command1_Click()
Dim i As Integer,j As Integer
Dim a(10, 10) As Integer
For i=1 To 3
For j=1 To 3
a(i，j)=(i-1)*3+j
Print a(i,j)；
Next j
Print
Next i
End Sub
程序运行后，单击命令按钮，窗体上显示的是______。

A) 1 2 3
2 4 6
3 6 9
B) 1 2 3
3 4 5
4 5 6
C) 1 2 3
2 5 8
3 6 9
D) 1 2 3
4 5 6
7 8 9