单项选择题
有如下程序: Private Sub Form_C1ick()
Dim CheCk,Counter
CheCk=True Counter=0
Do
Do While Counter<20
Counter=Counter+1
If Counter=10 Then
Check=False
Exit Do
End If
Loop Loop Until Check=False
Ptint Counter,Check End
Sub 程序运行后,单击窗体,输出结果为______。
A. 15 0
B. 20 -1
C. 10 Tree
D. 10 False