用方框中所给单词的适当形式填空，使对话通顺、正确。每词仅用一次。

A: Tim, let's talk about the future, I think it always makes us excited,

B: I agree with you. What's your prediction about the ?

A: I think every home will have a car.

B: But I think cars will make more .

A: No. Cars in the future will be green ones.

B: Great! Do you think people will have more free time in the future?

A: Yes. That's because there will be more. They will help people do some work.

B: I hope so. Do you think it will be morein the city?

A: No, I think more people will live in the countryside in the future.

B: Why?

A: Because the air there is very clean. It's good for health. More people will care about health.

B: You're right.