I showed several old friends of mine around the city, surprise，the changes had been so great.
A. whose
B. to whose
C. which
D. to which
网友回答
A. whose
(答案→)B. to whose
C. which
D. to which
解析：考查定语从句。本题定语从句的先行词是several old friends,在定语从句中有一个固定词组to one’s surprise让某人惊讶地是…；whose指代先行词在句中作为surprise的宾语。句意：我带领着几个朋友参观了我们的城市，让他们惊讶地是，变化是如此的巨大。故B正确。