i have been a teacher for twenty years.i ___ a teacher twenty years ___ (保持句意不变)
问题描述:
i have been a teacher for twenty years.
i ___ a teacher twenty years ___ (保持句意不变)
答
was ago
20年前,我就是一名教师。
答
第一个空wasn't
第二个空ago
答
I became a teacher twenty years ago.
答
i became a teacher twenty years ago.
答
I have been a teacher for twenty years.
我已经做了20年教师了.
I _became__ a teacher twenty years __ago_ .