求高中英语必修三,unit4的重点句!越多越好!可以不要翻译!（包括黑体字部分的句子也可以!）
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求高中英语必修三,unit4的重点句!越多越好!可以不要翻译!（包括黑体字部分的句子也可以!）
求高中英语必修三,unit4的重点句!
越多越好!
可以不要翻译!
（包括黑体字部分的句子也可以!）
求高中英语必修三,unit4的重点句!越多越好!可以不要翻译!（包括黑体字部分的句子也可以!）
However,according to a widely accepted theory,the universe began with a “Big Bang” that threw matter in all directions.
What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.
The earth became so violent that it was not clear whether the shape would last or not.
They were in time to produce carbon,nitrogen,water vapor and other gases,which were to make the earth’s atmosphere.
What is even more important is that as the earth cooled down,water began to appear on its surface.
It was not immediately obvious that water was to be fundamental to the development of life.What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.
Why they suddenly disappeared still remains a mystery.
They are putting too much carbon dioxide into the atmosphere,which prevents heat from escaping from the earth into space.
So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.
这里很多句子都是涉及到名词性从句.