S=0

 For i =         to 5

   S = s+i

 Next i

该程序运行后，循环体  S = s+i被执行4次，则循环变量i的初值是（     ）

Private Sub Text1_Change()

  Dim a, i As Integer

a= Val(Text1.Text)

  For i = 2 To 6 Step 2

    If a<= 15 Then a = a + i

  Next i

  Text1.Text = Str(a)

End Sub

若在文本框Text1中输入2，执行该程序段，For语句的循环次数为（  ）

    a(1) = 1

    For i = 2 To 12

      a(i) = a(i - 1) + Int(Rnd * 2) + 1

    Next i

    Key = Val(Text1.Text)

    i = 1: j = 12: cnt = 1: flag = False

    Do While i <= j And flag = False

      cnt = cnt + 1

      m = (i + j + 1) \ 2

      If a(m) = Key Then

        flag = True

      ElseIf Key > a(m) Then

        i = m + 1

      Else

        j = m - 1

      End If

    Loop

程序运行后，下列说法正确的是（  ）