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
He wrote the book in ______ with his wife.
A．proportion
B．installment
C．correspondence
D．collaboration
单项选择题
______ he does his work, I don’t mind what time he arrives at the office.
A．So far as
B．So long as
C．In case
D．Meanwhile
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