Put this code in the ThisWorkbook module of the VBE. Adjust as necessary.
Code:
Private Sub Workbook_Open()
Dim myCell As Range
Dim myMsg As String
'Where is the cell of interest?
With Worksheets("Sheet1")
Set myCell = .Range("D1")
'Check our criteria
If myCell.Value = 0 Then
myMsg = .Range("A1").Value
ElseIf myCell.Value = 1 Then
myMsg = .Range("A2").Value
Else
'Not sure if there are other options...
End If
End With
Application.Speech.Speak myMsg
End Sub