单项选择题

A．Because it is hard to find natural resources.
B．Because it is hopeless to find natural resources.
C．Because it is poor in natural resources.
D．Because it is rich in natural resources.
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单项选择题
A．It is appropriate.B．It is too informal.C．It is normal.D．It is too formal.
A．It is appropriate.
B．It is too informal.
C．It is normal.
D．It is too formal.
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