—______ will the fog and haze last?—I’ve no idea. There is no sign of an end.

— ______ does your English teacher live, Michael? — About 30 minutes’ drive, so he gets up early every day.

Mr. Wang is ______ his wife in social standing地位, because his wife has made more contributions to our society than he has.

Glass can be _________many wonderful things.

His parents were worried that he        too much time chatting on line.