---Do you know ?-I’m not sure. Maybe he is a teacher.A. what the man with glasses isB.

问题补充：

---Do you know ? ---I’m not sure. Maybe he is a teacher.

A. what the man with glasses is

B. what is the man with glasses

C. who the man with glasses is

D. who is the man with glasses

答案：

(答案→)A. what the man with glasses is

B. what is the man with glasses

C. who the man with glasses is

D. who is the man with glasses

解析：句意：你知道那个戴眼镜的人是干什么的吗？我不能确定。或许他是老师。根据答语Maybe he is a teacher可知前面是在谈论职业，该用疑问词what。所选句子处在宾语从句的位置上，只能用陈述句语序，不能用疑问句语序，所影响A。