单项选择题

The meeting was so prolonged and exhausting that ______ the speakers stopped for refreshments.

A. at large
B. at ease
C. at intervals
D. at random
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Despite their good service provided, most inns are less expensive than hotels of ______ standards.
A. equivalent
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单项选择题
You must have he experience that you find your voice ______ on the telephone.
A. distorted
B. irregular
C. twisted
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