Question

Have you ever met with this case in your life 　　　　 you can't understand others
even if they have said something several times？

A．where

B．what

C．that

D．which

Answer 1

：A

：考查定语从句。这个定语从句的先行词是this case,后面的定语从句句子很完整，you是主语，understand是谓语动词，others是宾语。故使用关系副词。选项中只有A是关系副词。故A正确。