阅读下面短文，掌握其大意，然后从每题所给的A、B、C三个选项中选出最佳选项。
People around the world use different Ways to communicate. We communicate with each other not only through 1 but also through body language. Because body language is so 2. You'll have to know what yours means and what other people's means. Here are some examples 3 body language.
If you drop down heavily and your head is down, this may 4 that you are sad or not happy. If you sit with a smiling face and look 5, you are expressing friendliness. A smile is a way of expressing friendliness and interest. But people 6 smile just to be polite. Friendliness and interest are expressed when a person's eyes 7 yours, especially when you're talking. A person who doesn't 8 you is showing that he is not interested in your talk.
Hand gestures can mean a person is interested in the conversation. But repeated (重复的) movements, like hitting a pencil lightly against something again and again, often mean the person is 9 or not patient. Stay away from someone who 10 at you while talking with you — that person might be angry with you or feel better than you.
