问题
选择题
________ some teenagers don’t realize is ________ difficult life can be after they get addicted to drugs.
A．What; how
B．That; how
C．What; what a
D．That; what
答案
答案：A
题目分析：第一空是主语从句，what作realize的宾语，第二空是表语从句，how修饰difficult。句意：一些青少年所意识不到的是他们染上毒瘾之后生活是多么的艰难啊。