1. (2020高二上·上海月考) 有如下程序段：

Const n = 10

Dim a(1 To 10) As Integer

m = Int(Rnd * n + 1)

For i = 1 To 10

  a(i) = 0

Next i

i = 0: j = 0: c = 1: ans = ""

Do While c <= 3

  i = i Mod n + 1

  If a(i) = 0 Then j = j + 1

  If j = m Then

    a(i) = 1: c = c + 1

      j = 0: ans = ans + Str(i)

  End If

Loop

Text1.Text = ans

执行上述程序段后，文本框Text1中不可能的内容是（    ）