问题补充:
---He seems to be a teacher.
---. He has been a teacher for 20 years.
A. So he does
B. So he is
C. So does he
D. So is he
答案:
A. So he does
(答案→)B. So he is
C. So does he
D. So is he
解析:考察so的固定句式。so的几个特殊结构有:“So+助动词/情态动词/be动词+另外一主语”表示前面的肯定情况适用于另外一个人。“neither/noe+助动词/情态动词/be动词+另外一主语” 表示前面的否定情况适用于另外一个人。“So+同一主语+助动词/情态动词/be动词”表示前面的情况属实。本题表示的是前面的情况属实,因为前面有系动词be,故B项正确。句意:—他似乎是一个老师。—的确如此。他已经做了的老师了。故B正确。