单项选择题

A．She didn’’t clean the dorm.
B．Her dorm is messy.
C．She will help the man clean his dorm.
D．She cleaned the library.
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单项选择题
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单项选择题
Out of the seven pollutants mentioned in the first half of the article, hybrid cars produce fewer pollutants in at least five cases.
A．Y
B．N
C．NG
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