It is known to all that every minute _____ full use of ______ the lessons will benefit students a great deal [ ]

Funny jokes can always make us _____ when we are sad.

________ my father _______ my mother is able to drive a car. However, they are going to buy one.

She ___ volleyball regularly for many years whenshe was young.

They are too _________for me. I prefer the plain ones.[ ]