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

发布时间：2020-08-17 01:09:48

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

网友回答

A. made for
B. set out
C. took off
D. turned up
解析：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。
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