1、单元尾 核心要点回扣.重点单词1_vt.喜欢 prep. 相像的_adj. 可能的2_adj.猛烈的；激烈的；强暴的_n暴力_adv.暴力地；猛烈地3_n&v.伤害_adj.有害的_adj.无害的4_vi.存在；生存_n存在；生存5_n谜；难题vt.&vi.(使)迷惑；(使)为难_adj.令人迷惑的，困惑的_adj.迷惑的，困惑的【答案】1.like；likely2.violent；violence；violently3harm；harmful；harmless4.exist；existence5puzzle；puzzling；puzzled.重点短语1.2.3.4.【答案】1.in；at；i
2、n；at2.in；in；by；to do3out；away from；down；in；into；through；up4out for；over；out.重点句式1The earth became _ it was not clear whether the shape would last or not.地球(开始)变得激烈动荡，不知道这个形状是否会继续存在下去。2This produced a chain reaction，which_for life _.这就产生了一种连锁反应，使得生命的发展成为可能。3But when I tried to step forward，I found I
3、was carried _ on the earth and fell over.但当我试着向前迈步的时候，我发觉我被送出去很远，步子的跨度竟是在地球上的两倍，因而我摔倒了。4“Oh dear，”I cried，“walking does need a bit of practice _ gravity has changed.”“天哪，”我大声说，“重力改变了，看来走路也的确需要练一练了。”5_ was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.
4、随后它会变成什么没人能知道，直到3845亿年前之间，这团尘埃才慢慢地形成了一个固体的球状物。6So _ for millions of years to come will depend on whether this problem can be solved.所以，在未来的数百万年中，生命能否在地球上延续下去取决于这个问题能否得到解决。【答案】1.so violent that2.made it possible；to develop3.twice as far as4.now that5.What it was to become6.whether life will continue
5、on the earth.概要写作细读P25P26教材课文，根据下列提示词汇写一篇60词左右的概要。dust，settle into，produce，atmosphere，cool down，appear，allow，dissolve，develop，small plants，multiply，follow，spread，humans_【参考范文】Many years after the “Big Bang”，the dust began to settle into a solid ball that produced many things，which make the earths at
6、mosphere.As the earth cooled down，water began to appear and allowed the earth to dissolve harmful gases.Then life began to develop.Many millions of years later，small plants appeared and multiplied.Land animals followed after the first green plants appeared.Then small clever animals spread all over the earth.
