The magician picked several persons ______
题型:单项选择题
问题:
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
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