问题
选择题
Never believe all ____ you hear, never regret what you have never lost, and never throw away what you have in your hands.
A．that
B．which
C．what
D．when
答案
答案：A
考查定语从句的关系词。先行词是all，定语从句缺少hear的宾语，所以用that引导，which不能引导先行词是all的定语从句。选A。