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
考查名词性从句。第一空是主语从句，从句中缺少宾语所以用关系what，第二空是表语从句，此句是一个感叹句，空后面的词是形容词difficult所以用how修饰，故选A。