Every student is _____ to obey the school rules.

Listen, Mum. I heard the footsteps. Is it Dad? —It ___ be him. He’s gone to Beijing on business this morning.

Jackie Chan has donateddollars to charity.—He is an example to us all.

Haven’t I told you that you should get home earlier?—Yes, but I __________ home earlier than I usually do.

If daddy ____, we will go to the mountains tomorrow.