单项选择题

A．By forcing them farming.
B．By affecting the quality of soils.
C．By adding chemicals and pollute the waterways.
D．By affecting the environments they live in.
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单项选择题
A．He didn’t know that she was enrolled in a linear algebra course.B．He thought she preferred to study alone.C．He thought she had made arrangements to study withD．He had told her that he had done poorly on a recent test.
A．He didn’t know that she was enrolled in a linear algebra course.
B．He thought she preferred to study alone.
C．He thought she had made arrangements to study with
D．He had told her that he had done poorly on a recent test.
单项选择题
A．Study a weather map.B．Visit a weather station.C．Watch a weather report.D．Go to a storm shelter.
A．Study a weather map.
B．Visit a weather station.
C．Watch a weather report.
D．Go to a storm shelter.
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