Hey Deb,
If you double click the Drop Down list the properties dialog should open,
From here you can choose where the values for the drop down will be
populated from e.g. these values can be hard coded, retrieved from a data
connection or from somewhere else in the forms xml structure.
Simply put all you have to do is point your drop down list the repeating
field in your xml structure.

So if you have the following xml structure

<Root>
   <DropDownField></DropDownField>
   <DropDownOptions>
       <Option>Yes</Option>
       <Option>No</Option>
       <Option>Unknown</Option>
   </DropDownOptions>
</Root>

The steps you would take are
1:  Double click on your Drop down list (Drop-Down List Box Properties are
displayed)
2: In the bottom half of this dialog you'll see a "List box entries" title
below this there are 3 option buttons (enter list box entries manually,
Lookup values from forms data source and lookup values from an external data
source. Select the second option ("Look up values in the form's data
source")
3:You should have noticed that the last part of the properties dialog has
updated, Click on the button next to the entries field ("Select a field or
group dialog is displayed" you should also notice that your xml structure is
displayed in this dialog)
4: Navigate to the the xml field that represents your repeating table in
your second view. Repeating fields can be identified by a little blue icon.
Based on the Xml structure above you would select the Option field.
5: Click ok to select the field (you have now mapped the drop down list to
the repeating section)
6: Click ok to apply the changes and close the Drop down list properties
dialog.

Hope this helps

Cheers
Ben