单项选择题

When asked to ______ the age of the antique, you need to have a special knowledge of the history.

A．think
B．guess
C．tell
D．suppose
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单项选择题
Delaying the problem too long won't help ______ it.
A．solving
B．solve
C．to solve
D．solves
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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