the“Big Bang”.The earth exploded loudly with fire and rock.______2____________3______ surface.It allowed the earth to dissolve ______4______(harm)gases.Then life began to develop.
Small
plants
multiplied
and
filled
the
first oceans and seas with oxygen.This encouraged the ______5______(develop)of early shellfish and fish.Land animals such ______6______ insects,reptiles and dinosaurs appeared after green plants appeared.Small clever animals spread all ______7______ the earth.They are putting too much carbon dioxide into the atmosphere,______8______ prevents heat from escaping from the earth into space.______9______ life will continue on the earth for millions of years to come will depend on whether this problem can ______10______(solve).答案:1.a 2.They 3.its 4.harmful 5.development 6.as 7.over 8.which 9.Whether 10.be solved
[写作素材]恐龙在地球上存活了好多年。他们生下小恐龙温暖的气候使他们迅速繁殖。可惜他们未能制止自己的消失。此后人类就开始统治这个地球。提示:黑体部分用本单元词汇表[连句成篇](将以上句子连成一篇50词左右的英语短文。)____
________________________________________________________________________
________________________________________________________________________
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