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阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

No one knows   1.   (exact) how the earth began, as it happened so long ago. However, according to a widely   2.  (accept) theory, the universe began   3.  a “Big Bang” that threw matter in all    4.  (direction). For several billion years after the “Big Bang”, the earth was still just a cloud of dust.   5.  it was to become was    6.   (certain) until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. The earth became so    7.   (violence) that it was not clear    8.   the shape would last or not. It exploded loudly with fire and rock. They were in time    9.   (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    10.  surface.

高一英语语法填空中等难度题

少年,再来一题如何?
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