【单选题】

Body language is a personal thing. It says a lot about a person, such as whether he {{U}} (34) {{/U}} respect for others to whom he is talking, and whether he pays proper {{U}} (35) {{/U}}to someone else’s ideas.
Think about your own body language. It is important to pay attention to it. {{U}} (36) {{/U}}, when you meet someone, don’t stand too {{U}} (37) {{/U}}.An uncomfortable nearness is very {{U}} (38) {{/U}} to the other per- son, {{U}} (39) {{/U}} keep your physical distance, {{U}} (40) {{/U}} he’ll have to keep backing off from you. {{U}} (41) {{/U}} two feet will do.
Some of the {{U}} (42) {{/U}} in which your body will tell the other person you are {{U}} (43) {{/U}} carefully are.: Sit attentively(专注地) in your chair. {{U}} (44) {{/U}} you slump(垂头弯腰地坐) down on your backbone, your {{U}} (45) {{/U}} straight out in front of you, your body is saying, "I don’t care what you’re {{U}} (46) {{/U}}; I’m not interesteD、" {{U}} (47) {{/U}} the face of the person speaking and do not let your eyes roam (漫游) arounD、It’s{{U}} (48) {{/U}}to give the person speaking your {{U}} (49) {{/U}} attention.
Keep your legs {{U}} (50) {{/U}}.Do not keep changing your position.Crossing and uncrossing your knees shows either aching legs or the{{U}} (51) {{/U}}that you can {{U}} (52) {{/U}} wait to get away. It is the way you may feel, but you should certainly {{U}} (53) {{/U}} that fact.

[A] reason [B] purpose [C] situation [D] fact