单项选择题

A．Computers and business courses.
B．Courses to earn degrees.
C．Repairing course.
D．Cooking course.
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单项选择题
A．Half an hour.B．Longer than half an hour.C．Longer than an hour.D．It depends on different people.
A．Half an hour.
B．Longer than half an hour.
C．Longer than an hour.
D．It depends on different people.
单项选择题
A．$60.B．$50.C．$45.D．$15.
A．$60.
B．$50.
C．$45.
D．$15.
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