Question

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

A. by accident B. at random C. at risk D. on average

Answer 1

【答案】B

【解析】

试题分析：考查介词短语辨析。介词短语by accident偶然；at random胡乱；at risk冒险；on average平均；句意：魔术师从观众中胡乱挑选了几个人，请他们帮助他进行表演。根据句意可知B正确。