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A．Because nearly 1,000 million acres of land was burned off.
B．Because natural resources are being used up.
C．Because animals and plants arc in danger of extinction.
D．Because natural beauty of the land would be ruined.
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单项选择题
A．The steamer took him to the harbor.B．He was left alone there.C．He was saved.D．None of the above.
A．The steamer took him to the harbor.
B．He was left alone there.
C．He was saved.
D．None of the above.
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