单项选择题
She worked as ______ editor for a magazine.
A. /
B. an
C. a
D. the
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单项选择题
She ______ herself about thirty pounds a week, because she used to pay her neighbor to look after the two children.
A. had saved
B. must save
C. has saved
D. must have saved
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单项选择题
Money serves as a means of accumulating wealth and as a universal______ of exchange in the highly diversified commercial world.
A. measure
B. intermediate
C. medium
D. mechanism
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