问题
选择题
I’ll never forget the moment _____I first met Mary and _____ makes me already feel happy.
A．that; that
B．which; what
C．at which; which
D．when; what
答案
答案：C
两个定语从句同时修饰一个先行词 , 要区别对待。I first met Mary中不缺主语和宾语，用when引导定语从句，在句中作状语，此处可相当于at which；第二个空用which或that引导，在从句中做makes的主语。故答案为C。