Question

【题目】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

Answer 1

【答案】B
【解析】句意：一个在南部岛上旅行的画家偶然发现了一只古希腊花瓶。at random“任意地，随便地”；by chance“偶然地，意外地”；in return“反过来，作为报答”；on occasion“有时， 间或”。根据句意选B。