_______we admit that there are still some problems about NMET,we don’t mean that it is of no use

You needn’t have ________ the speaker when he wasspeaking; there was enough time afterwards for you to ask questions.

Weareoftentoldnotto____tothedifficultieswemeetwith.

They are not _______ pants. _______ are under the bed.

I never thought of it before, _______ all that my parents had done for me for granted.