实现上述功能的VB程序代码如下，请在划线处填上合适的代码。

Dim a( 1 To 20) As Integer

Private Sub Command1_Click ( )

Dim key As Integer

key =   ①   

i = 1

Do While key > a ( i ) And ( i <= 1 5 )

i = i + 1

Loop

Label4.Caption = “该数插入的位置是：” + Str ( i )

If  i = 16  Then

a ( i ) = key

Else

For j = 16  To  i + 1 Step -1

    ②  

Next j

a ( i ) = key

End  If

List2. Clear

For i = 1 To 16

List2.AddItem a( i)

Next i

End Sub

Private Sub Form_Load( )

'随机生成15个200以内的正整数

Randomize

For i = 1 To 15

a ( i ) = Int(Rnd * 200) + 1

Next i

'将15个数从小到大排序

For i = 1 To 14

k = i

For j = i + 1 To 15

If a ( k ) > a ( j ) Then k = j

Next j

If  i <>k  Then

t = a(i)； a( i) = a ( k )：a ( k )

End  If

Next i

'将排好序的数输出在列表框Listl中

Listl.Clear

For i = 1 To 15

Listl.AddItem str ( a ( i ) )

Next i

End Sub

程序中①划线处应填入{#blank#}1{#/blank#}，程序中②划线处应填入{#blank#}2{#/blank#}

Private Sub Command1_Click()

 Dim a(1 To 5) As Integer

 a(5)=Val(Text1.text)

 For i=4 To 1 Step -1

   a(i)=a(i+1)\2

 Next i

 Label1.caption=str(a(1))

End sub

在文本框Text1中输入“100”,单击命令按钮Command1后,标签Label1中显示的内容是（  ）

程序部分代码如下：

Private Sub Command1_Click()

Dim n, m, s, i, j, count As Long

Dim flag As Boolean

Dim a(1 To 100) As Integer

n = Val(Text1.Text)

count = 0

  ①  

For i = 0 to s-1

 m = i

 For j = 1 To n

 a(j) = m Mod 2

 m = m \ 2

Next j

flag = True

For j = 1 To n - 1

 If  ②  Then flag = false: exit For

Next j

If flag = True Then  ③  

Next i

Label1.Caption =“可行方案共”+ Str(count) + “种”

End Sub

Dim a(1 To 6) As Integer

Randomize

a=n Mod k

n=n\k,k=k+1,s=s+a

a(1) = Int(11 * Rnd) + 2

For i = 2 To 6

a(i) = Int(11 * Rnd) + 2

If i Mod 2 = 1 And Not prime(a(i)) Then i = i - 1

ElseIf Not prime(a(i)) Then a(i) = a(i) + a(i - 1)

End If

Next i

'自定义函数 prime()用于判断参数是否为质数，prime(n) = True 则说明 n 为质数，否则为合数，定义函数代码略执行该程序后，a(1)～a(6)的值不．可．能．为（  ）