单项选择题

The Channel Tunnel is one of the biggest engineering projects ever ______.

A．undergone
B．conquered
C．underlined
D．violated
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单项选择题
The processor could hardly find ______ data that have been collected for the research project.
A．prospective
B．general
C．plenty
D．sufficient
单项选择题
Many African children live in extreme poverty. Lack of proper nourishment reduces their power to ______ disease.
A．assist
B．consist
C．resist
D．persist
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