单项选择题

A．The problem may have been a very complicated one.
B．No one can do it.
C．The woman thinks that the problem is too easy.
D．The man can solve the problem himself.
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单项选择题
A．The farmers there have brought it under control.B．The factories there have found a good use for it.C．The climate there is unfavorable to its growth.D．The soil there is not so suitable for the plant.
A．The farmers there have brought it under control.
B．The factories there have found a good use for it.
C．The climate there is unfavorable to its growth.
D．The soil there is not so suitable for the plant.
单项选择题
In the past, epidemics spread much faster than at present.
A．Y
B．N
C．NG
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