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从方框中选择恰当的句 从方框中选择恰当的句子完成下面的对话. A:The south tigers may become

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从方框中选择恰当的句
从方框中选择恰当的句子完成下面的对话.
A:The south tigers may become extinct (灭绝的) within 30 to 50 years if it does not receive protection.
B:1______
A:There are 20 to 30 South China tigers.Guangdong Province has only five left because forests are being
     destroyed.
B:2______
A:The life span of the South China tiger is 20 to 25 years,but the tigers breed (繁殖) and the survival rate
     (成活率 for cubs (小虎) is poor.
B:Why not clone (克隆) the tiger?
A:It's not that easy.3______
B:What would happen in the future?
A:Well,I'm afraid we may not have this kind of animal at all in the 21st century without hard work and help
    from the scientists.
B:4______
A:Yes.I hear that the scientists are trying there best to save the tigers,including (包括) the Northeast tigers.
B:5______
A:I think so.
A.Do you know how many years a tiger can live?
B.What a pity,isn't it?
C.How many tigers are there in the south?
D.Can a tiger live as long as a man?
E.They are sure to succeed.
F.I'm sorry to hear that.
G.Chinese scientists can't make it at the moment.
1-5:CAGBE