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

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参考答案

答案解析

因为这个讨论是pm1onged and exhausting的，pro1onged and exhausting就表达了作者的态度，所以空格处填入的词语应该是一中性词。答案是B，atinterva1s(时不时地)。at1arge“详细的”；at ease“自由自在地”；at random“胡乱地”。

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