单项选择题

To their great surprise, they found the floodwater had damaged the building's foundation.

A．underlain
B．underlined
C．undertaken
D．undermined
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单项选择题
Mr. Johnson was a passionate person filled with an incredible dynamism.
A．energy
B．endurance
C．effort
D．endeavor
单项选择题
Peter was seen crying when he came out of the office. We can deduce that he must have been punished.
A．confer
B．refer
C．prefer
D．infer
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