Question

---Where did you come across our chemistry teacher ?

       --- It was in the supermarket ______I purchased mooncakes．

       A．that         B．which          C．where       D．When

Answer 1

C

解析:

这是一个省略了的强调句。完整句子是：It was in the supermarket that I purchased mooncakes that I came across our chemistry teacher. 要填的词是强调部分所带定语从句的引导词。