Open Workbook to last active sheet

Have a workbook with a lot of sheets,can I open it to last active sheet if saved to different name? Workbook is called Master,so if it's call something different it opens to last active sheet.Now
the workbook opens to proposal as default.Need to open to last active sheet?

If ThisWorkbook.Name = "Master" Then
Sheets("Proposal").Select
else
If ThisWorkbook.Name <> "Master" Then
??????????????????
End If