单选题
The magician picked several persons ______ from the audience and asked them to help him with the performance.
A、
by accident
B、
at random
C、
on occasion
D、
on average
【正确答案】
B
【答案解析】
[分析] 习语辨析。 A．by accident偶然；B．at random随便地，任意地，胡乱地：C．on occasion有时，D．on average平均起来；因此B为答案。
提交答案
关闭