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literate
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单项选择题
A．Insects Out of ControlB．An Urgent Challenge in AgricultureC．How to Use Insecticides ProperlyD．Insects and Insecticides
A．Insects Out of Control
B．An Urgent Challenge in Agriculture
C．How to Use Insecticides Properly
D．Insects and Insecticides
单项选择题
A．A bus station.B．An airport.C．A super highway.D．A train station.
A．A bus station.
B．An airport.
C．A super highway.
D．A train station.
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