You'd better not _____old people at mid-night. It may be dangerous.

    It's very important(重要的) for us to be healthy. Now I'll tell you how I can be healthy. I often eat fruit and vegetables. I don't like to eat hamburgers. They are not good for my health. I have a balanced diet. Many foods are important, such as rice, meat, eggs, vegetables and fruit. I like to eat apples. As the saying(谚语) says, “An apple a day keeps the doctor away.” And I also like doing sports. I like running in the morning. I play basketball in the afternoon with my friends. And sometimes I play ping­pong with my family at the gym on Saturdays. I think I'm healthy and strong. What about you?

如果a＞b，c＜0，那么下列不等式成立的是（      ）

读“地球的西半球图”，回答以下问题。