_____ Monday morning he wrote an article on grammar._____ Monday morning he had written an article

题目简介

_____ Monday morning he wrote an article on grammar._____ Monday morning he had written an article

题目详情

_____ Monday morning he wrote an article on grammar. 
_____ Monday morning he had written an article on grammar. 
A.ByB.OnC.AtD./
题型:单选题难度:偏易来源:不详

答案

B
A.用on(at)+过去时间状语,句子用过去时;by+过去时间状语,句子用过去完成时.

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