问题
选择题
——Where did you come across our chemistry teacher ?
------ It was in the supermarket ______ I purchased mooncakes.
A．that
B．which
C．where
D．when
答案
答案：C
本题考查强调句的省略用法，被强调部分是一个定语从句，在mooncakes后省略了that I came across our chemistry teacher.