Dim data(10) As Integer     ‘①

Dim n As Integer     ‘n表示总元素个数

Private Sub Command1_Click()

 Dim t As Integer

 t = Val(Text1.Text)

 For i = t To n-1

   ② 

 Next i

 n = n - 1

 For i = 1 To n

   ③ 

 Next i

End Sub

Private Sub Form_Load()

Dim i As Integer

n = 10

For i = 1 To n

  data(i) = i * 2

  List1.AddItem Str(data(i))

Next i

End Sub

Private Sub Command1_Click()

Dim r As Single, s As Single            '①

r="10米"                     '②

s=3.14159*r*r            '③

Text2.Text ="某个半径为"+ Str(r)+"米的圆,其面积为"+ Str(s)+"平方米."             '④

End Sub

则程序中出错的语句是（   ）