单项选择题

A．Green.
B．Red.
C．White.
D．Black.
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单项选择题
A．People will have to rely on kudzu for a living.B．They will soon be overgrown with kudzu.C．They will become too hard to plough.D．People will find it hard to protect the soil.
A．People will have to rely on kudzu for a living.
B．They will soon be overgrown with kudzu.
C．They will become too hard to plough.
D．People will find it hard to protect the soil.
单项选择题
An oil spill can pose a big problem to the environment.
A．Y
B．N
C．NG
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