People say that young Chinese students’ eyesight keeps dropping _________ because of both too much homework and poor learning conditions

After Steven sent some e-mails, he surfing the Internet.

You ran into Mr. Li! How did thathappen——Well, _______ of us was looking wherewe were going. We came around the corner at the same time.

Many students are unhealthy because of a lack of exercise–I agree. They should start exercising it’s too late.

youmind if I set out earlier tomorrow morning — Well, I’d rather you _______.