access二级考试题。。。求指教。。

Private Sub bt_Click()
    Dim cn As New ADODB.Connection
    Dim rs As New ADODB.Recordset
   
    Dim strSQL As String
    Dim sage As Single
        
    '设置当前数据库连接
    Set cn = CurrentProject.Connection
      
    strSQL = "select avg(年龄) from tEmp where 党员否"

    rs.Open strSQL, cn, adOpenDynamic, adLockOptimistic
   
    '*****Add1*****
   
    '*****Add1*****
        MsgBox "无党员职工的年龄数据"
        sage = 0
        Exit Sub
    Else
        sage = rs.Fields(0)
    End If
   
    '*****Add2*****
   
    '*****Add2*****
   
    rs.Close
    cn.Close
    Set rs = Nothing
    Set cn = Nothing
   
    '以下是外部文件写入操作
    If Dir(CurrentProject.Path & "\out.dat", vbDirection) <> vbNullString Then
       Kill CurrentProject.Path & "\out.dat"
    End If
    Open CurrentProject.Path & "\out.dat" For Output As #1
        Print #1, sage
    Close #1
End Sub