单项选择题

It is desired that the tour leader ______ us immediately of any change in plans.

A．inform
B．informs
C．informed
D．has informed
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单项选择题
______ I like economics, I like sociology much better.
A．As much as
B．So much
C．How much
D．Much as
单项选择题
China started in nuclear power industry only in recent years, and should ______ no time in catching up.
A．delay
B．lose
C．lag
D．lessen
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