Americans like to look at the other person in the eyes when they are talking. If you don’t do so, it means you are unhappy, or are not interested.For Americans, thumbs (拇指) up means yes, very good or well done; while thumbs down means the opposite. To call a waiter, people put one hand above the head. It is all right to point at things but not at people with the hand and index finger. Americans shake their index finger at children when they scold (训斥) them. And they touch the children on their heads when they admire (赞赏) them.Learning body language is difficult, If you don’t know what to do, the best thing to do is smile.( )1. In America, when people say “yes”, they put their thumbs down.A. Right B. Wrong( )2. When a waiter comes, the Americans put their index finger above the head.A. Right B. Wrong( )3. The most useful body language is smile.A. Right B. Wrong( )4. It is difficult to learn how to learn body language.A. Right B. Wrong( )5. Children will be afraid when his father shakes his index finger at them.A. Right B. Wrong