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

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 题型：词汇题。此题考查作状语用的介词短语。at intervals不时地，相隔一定距离。介词和名词间可插入形容词，如：at long intervals间或；at short intervals频频，常常。at ease自在；不拘束。at random随意地，胡乱地。at large自由地，未被捕的。如：He was still at large．他仍然逍遥法外。
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