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 wound ______ the meeting with a note of thanks to the committee.
A. at
B. up
C. off
D. down
单项选择题
______ is announced in the papers, our country has launched a large-scale movement against smuggling and fraudulent activities in foreign currency exchange deals.
A. That
B. As
C. Which
D. What
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