My brother has been teaching ________ he was 21 years old.A.whenB.ifC.forD.since-八年级英语

题目简介

My brother has been teaching ________ he was 21 years old.A.whenB.ifC.forD.since-八年级英语

题目详情

My brother has been teaching ________ he was 21 years old.
A.whenB.ifC.forD.since
题型:单选题难度:中档来源:不详

答案

D

试题分析:主句用的是现在完成时态。since,自从……(到现在)现在完成时的标志词。句意:我的弟弟自从21岁就一直在教学。

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