单项选择题

A．They could drive the insects away.
B．They could keep the plants well-watered.
C．They could build devices to trap insects.
D．They could make the plants grow faster.
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单项选择题
A．They will gradually die out.B．They will be able to survive in the preserves.C．They will have to migrate to find new homes.D．They will face extinction without artificial reproduction.
A．They will gradually die out.
B．They will be able to survive in the preserves.
C．They will have to migrate to find new homes.
D．They will face extinction without artificial reproduction.
单项选择题
A．It was sad.B．It was believable.C．It was boring.D．It was funny.
A．It was sad.
B．It was believable.
C．It was boring.
D．It was funny.
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