The two researchers originally set out to study the zebr Wap版

试题详情及答案解析

The two researchers originally set out to study the zebras in Africa and discovered a new species of tiger ______.

A．by chance	B．in addition
C．by nature	D．in need

答案：A

试题分析:句意：这两个研究人员本来动身去非洲是研究斑马的，他们却无意中发现了一种新的老虎物种。A. by chance 偶然地； B. in addition 此外； C. by nature 天生地； D. in need在危难中。选A。
考点：考查短语辨析