Hi , Ann. How can you improve your English so much–Oh, nothing difficult. The you work at it, the progress you will make.

I see Wei Han _______ English almost every morning.

Jack wasn’t saying anything, but the teacher smiled at him ________ he had done something very clever.(2011·湖南)

It is reported that there are various reasons _____more and more people feel depressed at this time of year.

Start out right away, _____you’ll miss the first train