—Why don’t you wear your jogging shorts, mum?—Well, my legs are too skinny, if you ______ know. 

--______ we clean the classroom at once? --No, you _____. You____ clean it after school.

．Just be patient. You ________expect the world to change so soon.

You ______ to the meeting this afternoon if you have something important to do.

—Do you think the phone is genuine(真品)? —I don’t think it ______ be a fake, as this shop has a very good reputation.