2. 考研
  3. The discussion was so prolonged and exhausting that______we had to stop for refreshments.

The discussion was so prolonged and exhausting that______we had to stop for refreshments.

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问题 The discussion was so prolonged and exhausting that______we had to stop for refreshments.
选项 A、at large
B、at ease
C、at random
D、at intervals
答案D
解析 空格处是说我们时不时地得停下来休息。固定词组at intervals的意思是“时不时，每间隔一段时间就……”，如：He visits me at regular intervals．(他总是间隔一定时间来看我。)at large意为“未被捕，详尽，普遍”；at ease意为“安逸，自由自在”；at random意为“胡乱地，随便地”。四个选项中只有D项为正确答案。
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