问题补充：
The man is our new headmaster.
A. who the teacher is talking to him
B. whom the teacher is talking
C. the teacher is talking to
D. who the teacher is talking
答案：
A. who the teacher is talking to him
B. whom the teacher is talking
(答案→)C. the teacher is talking to
D. who the teacher is talking
解析：考查定语从句，先行词是the man定语从句中缺少宾语，用that或which引导，也可以省略关系代词，句意：和老师说话的人是我们的新校长。选C。
