Access Combo Box

I have a msaccess database which has a query that open a form. I want to use a combo box to enter the parameter criteria for the query. Example: table-assigned responsible; query-open/in progress by responsible (when the query executes now it displays a box saying “Enter Assigned Responsible” and has a blank for the input) I want it to display the same input box, but with a combo box as the entry tool so the user can only enter the items from within the [assigned responsible] table.