7.    Make sure that everything ________  (be) ready now. Then let's begin.

6.    The water in the river will be________  (pollute) if factories pour dirty water into it.

5.    This is my ________ (predict) about my future.

4.    I think cities will be bigger and more ________ (crowd) in 50 years.

    I  think  there  is  going  to  be less________  (pollute) in the future.

    According to the weather forecast, there (be) a heavy rain the day after tomorrow.

3.    His father ________ (fly) to Beijing next week.

2.    David has ________  (little) money than Anna.

1.    People in the future will live _________   (be) 200 years old.

(       )8. My father is working_______ the computer. He is writing something.

A.  in                  B. on

C.  by                  D. over