单项选择题A．Because nothing in the world can be taken for granted.B．Because one always needs hard lessons before he becomes ma- ture.C．Because each young generation is curious about everything.D．Because the young generation must learn lessons to know drugs.

单项选择题A．The man doesn’t want to repeat what he Mid.B．The man has learned a lesson from his car accident.C．The man is shy, so he can’t drive fast.D．The woman can’t tolerate the man’s attitude.