脉来迟慢，马、骡一息不足三至，牛一息不足四至，猪、羊一息不足五六至，主（）
A.表证
B.寒证
C.热证
D.实证
E.里证
参考答案：B
_____ 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
