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单选题
The discussion was so prolonged and exhausting that _____ the speakers stopped for refreshments.
A
at large
B
at intervals
C
at ease
D
at random
参考答案
参考解析
解析：
句意：这个讨论如此漫长且令人疲惫，以至于发言人不时的停下来恢复精神。at intervals不时，时时。at large逍遥法外；未被捕获。at ease自在，舒适。at random任意，随机。
句意：这个讨论如此漫长且令人疲惫，以至于发言人不时的停下来恢复精神。at intervals不时，时时。at large逍遥法外；未被捕获。at ease自在，舒适。at random任意，随机。
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