It’stenyearssincethescientist________onhislife’sworkofdiscoveringthevaluablechemical.A.madeforB.took

题目简介

It’stenyearssincethescientist________onhislife’sworkofdiscoveringthevaluablechemical.A.madeforB.took

题目详情


It’s ten years since the scientist ________ on his life’s work of discovering the valuable chemical. 
A.madeforB.tookoffC.setoutD.turnedup
题型:单选题难度:偏易来源:不详

答案

C

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