Bill has a lot of teaching experience ,has't he?--Yes,indeed_English since 1950A He's taught.B He's teaching C He was teaching D He'd taught 选什么
问题描述：
Bill has a lot of teaching experience ,has't he?
--Yes,indeed_English since 1950
A He's taught.B He's teaching
C He was teaching D He'd taught 选什么
答
D 过去完成进行时
答
——Bill has a lot of teaching experience,hasn't he?——Yes,indeed he has taught since 1950.或者He has been a teacher since 1950/ He has been in school sine 1950.时态为现在,Bill has a lot of .指的是现...