.He said he _________ experiments those days.A.was doingB.had been doingC.has been doingD.is doing-高

题目简介

.He said he _________ experiments those days.A.was doingB.had been doingC.has been doingD.is doing-高

题目详情


.He said he _________ experiments those days.
A.was doingB.had been doingC.has been doingD.is doing
题型:单选题难度:偏易来源:不详

答案

B

更多内容推荐