It is known to all that every minute ____ full use of____ the lessons will benefit students a great deal．

Rick often plays volleyball______ his friends.[ ]

I didn’t see you at the meeting yesterday.– I _______ an important report at that moment.

Would you like to go and see avatar with me tonight?—Thank you very much, but I ___ it already.

I’ll teach you with my guitar, and you can borrow ­­­­________ for practice.