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

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

选项 A、at ease
B、at random
C、at intervals
D、at large

答案C

解析短语含义辨析题。at ease“自在，不拘束”；at random“随便地，任意地”；at intervals“不时，每隔一段时间”；at large“在逃；详尽的”。说话者应该是“不时停下”，故选C。

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专业英语四级

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