单项选择题

About ________cars and dogs are destroyed each year.

A．6 million
B．15 million
C．30 million
D．1 million
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单项选择题
What is the main purpose of the research
A．To make preparations for a new publication.
B．To learn how couples spend their weekends.
C．To know how housework is shared.
D．To investigate what people do at the weekend.
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