How to shorten the combobox filling time - 12 seconds

I have a user defined form with 20 comboboxes whose valid values are filled from different tables via Recordset. Recordset queries are quite simple, they just list the code and description of the values in each table.
But it takes approximately 12 seconds (!!) before all these valid values are filled and form is ready to use (navigate the records etc.)
Is there any practical solution to shorten this time ?

<i>I fill these 20 comboboxes programmatically, their content have to be dynamic since I get these values from other tables which are updated by end user. (I add other static valid values directly in XML file of the form.)
Each combo is filled with approximately 4-5 values now , but it takes 12 seconds till the form is ready to navigate records.
It makes no sense to wait so long for just one form, but it's a must to fill these combos dynamically.</i>
<b>Thanks Bill, I'll try your solution.</b>

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