单项选择题

Not all details of the microchip's performance are ______.

A．available
B．adequate
C．sufficient
D．approachable
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单项选择题
Every minute must be made full use ______ at the preparations for the exams.
A．of to work
B．of work
C．of working
D．to working
单项选择题
The feeling of loneliness which can ______ you when you are in a crowd is very difficult to get rid of.
A．overcome
B．defeat
C．beat up
D．creep over
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