题型：语法填空（语篇） 题类：常考题 难易度：普通
山东省济南一中2015-2016学年高一下学期期末英语考试试卷
No one knows (exact) how the earth began, as it happened so long ago. However, according to a widely (accept) theory, the universe began a “Big Bang” that threw matter in all (direction). For several billion years after the “Big Bang”, the earth was still just a cloud of dust. it was to become was (certain) until 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 dioxide, nitrogen, water vapour 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 surface.
试题篮
