单项选择题

A．They could drive the insects away.
B．They could keep the plants well-watered.
C．They could make the plants grow faster.
D．They could build devices to trap insects.
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单项选择题
A．She watched a movie all night.B．She had an eye operation.C．She took an exam all night long.D．She was studying all night.
A．She watched a movie all night.
B．She had an eye operation.
C．She took an exam all night long.
D．She was studying all night.
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