单项选择题

Although ______ American literature, he failed to remember the writer of the masterpiece.

A．be was knowing
B．he is knowing
C．knows
D．having a knowledge of
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单项选择题
The earnings of women are well below that of men ______ educational differences that are diminish-ing between the two sexes.
A．although
B．though
C．despite of
D．in spite of
单项选择题
Those superior states of mind do not come from ______ an alien culture.
A．imitating
B．mimicking
C．aping
D．parodying
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