抱歉让你为难，但我真的需要一个答案。

Sorry to ___put you ___on ___the ___spot, but I really need an answer.

他不想在众人面前让她难堪。

He didn't want to ___put her ___on ___the ___spot in front of everyone.

请不要在公共场合问我那个问题让我难堪。

Please don't ___put me ___on ___the ___spot by asking that in public.