单项选择题

The Lewis and Clark expedition ______the ten Story of the Louisiana Purchase and beyond as far as the Pacific Ocean.

A．located
B．searched
C．exploited
D．developed
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单项选择题
He swallows his words so much that I can never ______what he is saying.
A．make out
B．put up
C．deal with
D．take up
单项选择题
His strange behavior confirmed his neighbors in their______ that he was guilty.
A．suspicion
B．doubt
C．estimate
D．imagination
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