题型：语法填空（语篇） 题类：常考题 难易度：困难
四川省射洪县射洪中学2019届高三上学期英语开学考试（应届）试卷
No one knows exactly how the earth began, as it (happen) so long ago. However, according to a (wide) accepted theory, the universe began with a “Big Bang” that threw matter all directions. After that, atoms began to form and combine to create stars and other (body). For several billion years after the “Big Bang”, the earth was still jus cloud of dust. What it was to become was uncertain between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. The earth became so (violence) that it was not clear the shape would last or not. It exploded loudly with fire and rock. They were in time (produce) carbon, nitrogen, water vapour and other gases, which were to make the earth's atmosphere. What is even(important) is that as the earth cooled down, water began to appear on its surface.
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