问题
选择题
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
答案
：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。