Data Validation Fill the emptied cell with the list

Question

I have a sheet where user can only enter data based on data validation drop down list, ( the list contain "Yes", "NO" "N/A")is there any way through VBA or Data validation, fill the empty cell with the last item in the list ("N/A")when the workbook opens and keep the Data Validation format and delete the ("N/A") when the workbook close.

Thanks in Advance

Answer 1

我知道了，我使用了记录宏，有时没有想到简单的解决方案。