_______ his return from America, he got down to his research.A.WhileB.InC.AsD.On-高三英语

题目简介

_______ his return from America, he got down to his research.A.WhileB.InC.AsD.On-高三英语

题目详情

_______ his return from America, he got down to his research.
A.WhileB.InC.AsD.On
题型:单选题难度:中档来源:不详

答案

D

试题分析:考查固定句型结构。on+n/v-ing表示”一....就”。句意:他一从美国回来,就着手他的研究。故选D。As作介词时意思是“作为”,while不能做介词。

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