【题目】The president of the World Bank says he has a passion for China, ______ he remembers starting as early as his childhood.
A.where
B.which
C.what
D.when

【答案】B
【解析】句意：世界银行行长说他对中国有一种热情，他记得从他童年时代就开始有了这种热情。______ he remembers starting as early as his childhood。是一个非限制性定语从句，修饰先行词 a passion，在从句中作starting的宾语，故选B。