Columbus’s discovery of the “New World” took place .
A. on purpose
B. by accident
C. by design
D. by mistake
网友回答
A. on purpose
(答案→)B. by accident
C. by design
D. by mistake
解析：句意:哥伦布偶然发现了新大陆的。on purpose有目地的；by accident偶然； by design故意地； by mistake错误地。根据句意故选B。