The maths problem remained confusing to the boy although _______ over and over.A.explainingB.being e

题目简介

The maths problem remained confusing to the boy although _______ over and over.A.explainingB.being e

题目详情

The maths problem remained confusing to the boy although _______ over and over.
A.explainingB.being explained
C.explainedD.having explained
题型:单选题难度:中档来源:不详

答案

C
although引导让步状语从句,主从句主语一致,从句谓语动词为be动词,可将主语和谓语动词be一并省略,补全后为:...although it was explained...。

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