Question

——Where did you come across our chemistry teacher ?
------ It was in the supermarket ______ I purchased mooncakes.
that             B. which           C. where                D. when

Answer 1

C

主要测试强调句型的省略用法。被强调部分属于一个定语从句，只不过强调句的后半部分：that I came across our chemistry teacher省略了。此类试题属于高考常考题型。