–You should be _______ careful when you take the chemistry exam.--I agree. In this way, I will make _______ mistakes.

There is _____pollution and ____fishes in the river now than 20 years ago.

I think there will be _____ people and ______pollution.      

Max is __________ at playing volleyball than me. 

—It's much ___________today . Shall we go swimming this afternoon?—Good idea, I've got nothing to do.