The river surface used to be covered with waste and rubbish is now taking on a new look.
A. of which
B. along with
C. where
D. whose
网友回答
A. of which
B. along with
C. where
(答案→)D. whose
解析：whose+名词, 引导定语从句, whose在句中作定语。whose surface相当于the surface of which。