单项选择题

By travelling, reading and studying, the scholar devoted all his time to the ______ of knowledge.

A．acquisition
B．vocation
C．replacement
D．criterion
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单项选择题
People______ that vertical flight transports would carry millions of passengers as do the airliners of today.
A．comprehended
B．anticipated
C．revealed
D．asserted
单项选择题
The people who objected to the new approach were told that since work had already started there was no point in______.
A．protesting
B．overthrowing
C．reeling
D．growling
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