单项选择题

A．They are not as dangerous as people think.
B．They can be as friendly to humans as dogs.
C．They attack human beings by nature.
D．They are really tame sea animals.
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单项选择题
A．In a boat.B．In a cave.C．In a river.D．In a tree.
A．In a boat.
B．In a cave.
C．In a river.
D．In a tree.
单项选择题
A．The soil there is not so suitable for the plant.B．The factories there have found a good use for it.C．The farmers there have brought it under control.D．The climate there is unfavorable to its growth.
A．The soil there is not so suitable for the plant.
B．The factories there have found a good use for it.
C．The farmers there have brought it under control.
D．The climate there is unfavorable to its growth.
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