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I am not sure if I have understood your question correctly. Do you mean to say that you have 7 dropdown question in form and you want to ensure that any one of the dropdown is field. Is that correct?
Yes it is possible to achieve your requirement by taking advantage of "Conditions" feature. Please check the screenshot below:
Please take a look at the following demo form I created for you and see if this is something what you want to achieve: https://form.jotform.com/62421279587969
Feel free to clone this form for a closer look. The following guide should help you in form cloning: https://www.jotform.com/help/42-How-to-Clone-an-Existing-Form-from-a-URL
Hope this helps.
Do get back to us if you have any questions.