4. Scientists usually spend much time ________________ to achieve something.

3. He dreams of ____________ up a big cellphone company of his own.

2. Now the plan for “rejuvenating the nation by relying on science and education” 　　　　　　　

　　　　　　　 out in China.

set 　prove　 real　 solve　 carry　 try　 polite　 develop　 locate　 accept

1. I’m sure our dream will turn into _______________ some day.

10. ________(人类)must learn how to grow more food or millions will starve.

9. The breakthroughs made by Chinese scientists are _____ _____(印象深刻的).

8. Great Britain has an unwritten ________________(宪法)and the United States has a written one.

7. He studies hard to get his m________ degree.

6. We have a__ ____________ our study goals.