求高中英语必修三,unit4的重点句!
问题描述：
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!）
答
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...