I think there will be ______pollution and ______ cars in the future.

Someone says "Time is money. ” But I think time is _________ important than money.

—I don’t know which skirt was ______, so I took them both.
—Yes, it’s really difficult to choose.

Mrs Smith has got _______ instead of getting any better.

If there are _______ people driving, there will be ______ air pollution.

Book One is ________ than Book Two. Do you think so?

—My friend Lily always thinks        anyone else.
—Oh, she is a thoughtful girl.

—Why don’t you drive to work today?
—Sometimes riding is even          than driving during the busy traffic time.

The boys are ______this year than they were last year.

If there are ____trees, the air in our city will be ____cleaner.