2. 外语
  3. The discussion was so prolonged and exhausting that______the speakers stopped for refreshments.

The discussion was so prolonged and exhausting that______the speakers stopped for refreshments.

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问题 The discussion was so prolonged and exhausting that______the speakers stopped for refreshments.
选项 A、at large
B、at intervals
C、at ease
D、at random
答案B
解析 A项at large意为“逍遥法外；未被捕获”；B项at intervals意为“不时，时时”；C项at ease意为“自在，合适”；D项at random意为“任意，随机”。
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