四、语法填空。
What will people look like in the future? Someone makes 13. prediction. In the future, people 14. (have) larger heads and bigger eyes. Larger heads will be able 15. (keep) larger brains. People will become much 16. (smart).
Why will people have bigger eyes? That’s 17. people may go and live on other planets. They may be farther 18. the sun than the earth is. Then people need bigger eyes to see 19. (careful) and more clearly in the darker environment. Because UV radiations(紫外线)are stronger on other planets than those on the earth, 20. (people) skin(皮肤)won’t be so white as it was before.
What’s more, people will not need to open 21. (they) mouths to speak. They will talk by chips(芯片)in their heads.
However, someone 22. (not want) an appearance like this. Don’t worry. People will look like this in at least 20,000 years.

13.a 14.will have 15.to keep 16.smarter 17.because 18.from 19.more carefully 20.people’s 21.their 22.doesn’t want