问题
选择题
(2013·湖北，30)An artist who was recently traveling on a ferry to the southern island discovered________a long lost antique Greek vase.
A．at random
B．by chance
C．in turn
D．on occasion
答案
答案：B
考查短语辨析。此处表示“偶然发现了一个遗失多年的古希腊花瓶”，故选B。