4. . I       (buy) a house for my parents in five years.

3. We should eat less junk food and        (much) healthy food.

2. I have       (few) books than him.

5. People usually p       trees in spring.

4. The e       travels around the sun.

3. Everyone should play a part in protecting our        (环境) .

2. I hope there will be less       (污染) in the future.

1. Please write these words on a piece of        (纸) .

1. Kids       (not go) to school. They will study at home on computers.

(   ) 1. ―Will there be robots in people's homes?

      -     

   A. Yes,it will   B. Yes,there will

   C. No,there will   D. No,it won't