Gestures are the silent language of every culture. It is important to know the body language of every country, or we may be【B1】______. In the US, people greet each other with a handshake in a【B2】______discussion. The handshake must be firm. If the handshake is weak, it is a sign of unfriendliness or【B3】______. Friends may place a hand on the others arm or shoulder. Some people, usually women, greet each other with a hug. Space is important to Americans. When two people talk to each other, they usually stand about 2.5 feet away and at an angle, so they are not facing each other【B4】______. Americans get uncomfortable when a person stands too close. Americans like to look at the other in the eyes when they are talking. If you dont do so, it means you are bored, hiding something, or are not【B5】______. When you【B6】______someone, however, it is not polite. For Americans, thumbs up means 'yes', 'very good' or 'well done'. Thumbs down means the opposite. To call a waiter, one might【B7】______one hand to head level or above. To show you want the check, make a movement with your hands as you are signing a piece of paper. It is all right to【B8】______things but not at people with the hand and index finger. Americans shake their index fingers at children when they scold them and pat them on the head when they【B9】______them. Learning a cultures body language is sometimes【B10】______. If you dont know what to do, the safest thing to do is to smile. 【B1】