单项选择题

A．To do comprehensive exercises.
B．To read simple sentences.
C．To copy out from the textbooks.
D．To do all of the above.
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单项选择题
A．He drank too much coffee last night.B．He has the flu.C．He is nervous about his anthropology project.D．He missed dinner last night.
A．He drank too much coffee last night.
B．He has the flu.
C．He is nervous about his anthropology project.
D．He missed dinner last night.
填空题
economics
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