求老师解答：阅读下列短文,根据上

求老师解答：阅读下列短文,根据上
阅读下列短文,根据上下文填入适当的词语,或使用括号中的词语的适当形式填空.
No one knows exactly how the earth began.However,according to a widely accepted theory,it
began 1 a "Big Bang".Then the earth exploded loudly and produced water vapor and many gases,
2 (make) the earth's atmosphere.And then as the earth cooled down,water appeared and stayed
3 the surface.It was the presence of water 4 allowed the earth to dissolve harmful gases and acids
into the oceans and seas, 5 made it possible for life to develop.And the 6 (appear) of small plants
encouraged the development of early shellfish and all sorts of fish.Next,green plants began to grow on
land. 7 were followed by land animals.Later,reptiles appeared for the first time,after which dinosaurs developed.However,they suddenly disappeared.Therefore,mammals 8 (rise) on the earth.Finally,
humans appeared and spread all over the earth.However,they are putting too much carbon dioxide into
the atmosphere,making the earth too hot to live on.So 9 life will continue on the earth will depend on
whether this problem can 10
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1.with 2.making 3.on 4.that5.which 6.appearance
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