以下程序的功能是：从键盘上输入若干个数字，当输入负数时结束输入，统计出若干数字的平均值，显示结果。请填空。 Private Sub Form click()Dim x，y As SingleDim z As Integerx=Input Box (”Enter a score")Do while 【13】 y=y + x 2=2+1 x=Input Box (”Enter a score") Loop if =0 Then 2=1 End lf y=y/z msgbox y End Sub

A. substantial damage
B. as different
C. the terrorist attacks
D. the city’s economy
E. the rest of the nation
F. clearly avoidable
G. easily noticeable

The nation had already slipped into a recession before ______.