1. 单项填空：
从A,B,C,D四个选项中选出可以填入空白处的正确答案。
1. The man ______ talked to you just now is an Engineer.
A. who B. whose C. which D. what
2. I still remember the days _______ we spent together.
A. that B. where C. when D. who
3. The doctor _________ is leaving for Africa next month.
A. the nurse is talking to him B. whom the nurse is talking
C. the nurse is talking to D. who the nurse is talking
