It is ten years since the scientist ______ on his life’s work of discovering the

题型：不详难度：来源：

It is ten years since the scientist ______ on his life’s work of discovering the valuable    chemical.

A．made for

B．set out

C．took off

D．turned up

答案

.B

解析

试题分析：考查词组辨析：A.made for有助于，前进，B.set out出发，着手C.took off起飞，脱下，D.turned up，出现，露面，声音调大，句意：自从这个科学家着手开始做终身的工作寻找有价值的化学物质已经有10年了。选B。
点评：动词的固定搭配是常考题，这就要求考生平时加强这方面的记忆和积累。根据语境进行选择。