单项选择题

A．She doesn’t know how to swim.
B．The water was too deep.
C．Tile water was too cold.
D．She didn’t have enough time.
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单项选择题
A．Whether it can be detected and checked.B．Whether it will lead to widespread food shortage.C．Whether global warming will speed up in the future.D．Whether it will affect their own lives.
A．Whether it can be detected and checked.
B．Whether it will lead to widespread food shortage.
C．Whether global warming will speed up in the future.
D．Whether it will affect their own lives.
单项选择题
A．Pollution of the environment.B．A new generation of pest killers.C．Over-killing by hunters.D．Destruction of their natural homes.
A．Pollution of the environment.
B．A new generation of pest killers.
C．Over-killing by hunters.
D．Destruction of their natural homes.
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