单项选择题

You should have your eyes tested every year in case the ______of your spectacles need changing.

A．lenses
B．glasses
C．sights
D．crystals
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单项选择题
His answer was so confused that I could hardly make any ______ of it at all.
A．explanation
B．meaning
C．sense
D．interpretation
单项选择题
The board deemed it’s urgent that these files ______ right away.
A．had to be printed
B．should have been printed
C．must be printed
D．should be printed
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