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
If the task ______ by the end of this year is delayed, the company will be under punishment.
A．being completed
B．is completed
C．to be completed
D．completed
单项选择题
The Housing Committee has decided to give ______ to the young married couple with only one child.
A．preferment
B．priority
C．superiority
D．prestige
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