单项选择题

Many hunting and gathering people of the late 10th century have recently adopted some form of organized agriculture to ______ their wild food resources.

A．accumulate
B．implement
C．compensate
D．supplement
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Paul is amazingly ______ in trying to get Mary to go out with him.
A．consecutive
B．condensed
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D．persistent
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He has impressed his employers considerably and ______ he is soon to be promoted.
A．simultaneously
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