【摘要】英语有许多重要的知识点，重要知识点的掌握要考平时的日积月累，精品学习网整理了高一英语Unit4归纳，供大家参考，轻松学习英语

Unit4

重点单词

astronomy atmosphere system violent solid

explode surface harmful development spread

method depend exist presence disappointed

publish gravity force gradually cheer

combine explore settle fundamental allow

atom mystery chain reaction multiply

dinosaur produce oxygen generally climate

lessen exhausting approach faint opportunity

carbon dioxide solve thus crash feed

重点短语

think of…as… in time cool down

go by now that come into existence

be different form lay eggs give birth to

on one’s surface as well as prevent ... from

escape from get close to cheer up

break out to one’s disappointment as a result of

be harmful to sb depend on in one’s presence

watch out in one’s turn

重点句子

1. That empty hole is like a mouth always needing to be fed.

2. I cheered up immediately … watching the earth become smaller….

3. We watched, amazed as the fire broke out on the outside of the spaceship.

4. This disappearance made possible the rise of mammals on the earth.

This produced a chain reaction, which made it possible for life to develop.

5. …. The earth may become too hot to live on.

6. They are putting too much carbon dioxide into the atmosphere, which prevent heat from escaping the earth into space.

7. So whether life will continue on the earth for the millions of year to come will depend on whether this problem can be solved.

…. It was not clear whether the shape would last or not.

【总结】以上就是高中高一英语Unit4的全部内容，精品学习网小编希望同学们都能扎实的掌握学过的知识，取得好的成绩!

相关链接：

Unit3高一英语汇总

人教版知识点汇总高一英语Unit2