The Beatles, many of you are old enough to remember, came from Liverpool.
A. what
B. that
C. how
D. as
网友回答
A. what
B. that
C. how
(答案→)D. as
解析：本题考查在实际语境中对于非限制性定语从句的应用能力。as引导定语从句，在从句中做remember的宾语，指代的是the Beatles“披头士乐队”。what引导名词性从句，在句中做主语宾语或表语，that引导限制性定语从句， how引导名词性从句。