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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单项选择题
The man will probably ________next week.
A．buy a new watch
B．go to bed earlier
C．change his job
D．see a doctor
单项选择题
The woman wants to know________.
A．how to sign up for a course
B．how she can help the man
C．how she can change her sleep rhythms
D．how sleep disorders are treated
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