2. 外语
  3. The magician picked several persons ______ from the audience and asked them to help him with the performance.

The magician picked several persons ______ from the audience and asked them to help him with the performance.

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问题 The magician picked several persons ______ from the audience and asked them to help him with the performance.
选项 A、by accident
B、on occasion
C、at random
D、on an average
答案C
解析 短语辨析。这四个选项都是短语，by accident表示“偶然”；on occasion表示“有时；遇必要时”；at random意指“随机抽取”；on an average表示“通常；按平均”。根据句意，为了表现魔术的魅力，要随机抽取观众参加表演才显得更真实，所以C)项符合题目要求。
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大学英语六级

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