– Must I stay here with you?-- No, you ______. You may go home, but you _____ go to the net bar(网吧).

—What do you think people can do for their aged parents?—They_________ do anything except to be with them and be themselves. 

— There is somebody at the door. ________ it be Tom?— No, it _______ be him. It’s just six o’clock. It’s too early.

----Jack, how are you feeling now?----I am much better, Mum, so you ______________  take me to see the doctor.

The problem is too difficult for him. He _______ solve it by himself without any help.