问题补充：
I showed an old friend of mine around the city,surprise, the changes had been so great.
A. whose
B. which
C. to whose
D. to which
答案：
A. whose
B. which
(答案→)C. to whose
D. to which
解析：考察定语从句，“我领我的老朋友参观了这个城市，让她吃惊的是这个城市变化太多了。”whose 引导定语从句并在从句中作定语，to sb’s surprise令某人吃惊的是，答案C。
