Look！Our math teacher is standing outside our classroom.—It ________ be him.He has gone to his office.

Where is my key? I remember I put it here yesterday.——–You ______ it in the wrong place.

I don’t feel like_________ today.

vernment has taken some measures to solve theshortage of electricity, but it may be some time _________ the situationimproves

Nothing is so easy as _____ parents to raise their expectations of their children too high.