It’stenyearssincethescientist_______onhislife’sworkofdiscoveringtheva

发布时间：2020-08-04 12:18:05

It’s ten years since the scientist _______ on his life’s work of discovering the valuable chemicalA.made forB.set outC.took offD.turned up

网友回答

B解析此题考查短语动词的辨析。make for some place “走向”；set out on sth. “开始做”；take off “脱下，(飞机)起飞”；turn up “出现、显现”。
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