Are you satisfied with what he has done? — Not at all. It can’t be ________.

Must I do my homework right away– No, you _____. You_____ do it later.

Would you do me a favor and carry these books—______.

In a sports team each player has a clearrole，and there arefew occasions members areconfused or uncertain of their roles

The light in the room wasn’t _______for me to read.