I really miss my American friend Nick. It’s nearly four years _____we last meet.

It’s quite hot in the room. You’d better_____________the windows or the door.

If you keep doing morning exercises everyday, you’ll benefit ______ it

Thestudents sometimes complain about their new teacher because he is too strict____ them.

What do you think of maths–My favorite. It’s ______ for me to studyof all the subjects in school.