Air pollution has become__________ than ever before. We must do something to stop it.

Usually the weather in July is even _______in Jiangsu than that in May.

---What do you think of Andy’s singing? --- No one does       .

—Ann, I am worried I’m getting fatter. What shall I do?—I think you should eat________food and do more exercise.

Sam and Bill are brothers. But Sam is _than Bill.