单项选择题

Lisa was busy taking notes _________ Mark was searching the Internet for the information.

A．until
B．unless
C．while
D．if
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单项选择题
My mistake in judgment _________the failure.
A．broke off
B．brought out
C．resulted from
D．led to
单项选择题
My impression of the service in the hotel was that it had really_________.
A．imagined
B．implied
C．imported
D．improved
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