People who eat a balanced diet should be ________ than those who only eat hamburgers.

The air in Lanzhou is getting much _____ now than a few years ago .

The ______ story made us very ______ . 

—I don’t want to do as ____sports as Tony does.—But you have to do if you want to be as  _____as he

They’ve got two machines, but ________ works well.