阅读理解。 When you don't speak, you may be still communicating. It is true that you may not wish to say anything. But your very silence may show your wish to be left alone or to stay uninvolved (不参与的), which is the message you want to send. So it has been said that while we speak with our vocal organs (发声器官), we converse with our whole bodies. All of us communicate with one another nonverbally, as well as with words. Sometimes we know what we're doing, as with the use of gestures such as the thumbs-up sign to indicate (表明) that we approve (赞成).But most of the time we're not aware (意识到的) that we are doing it. Body language serves a variety of purposes. Firstly it can replace verbal communication, as with the use of gesture. Secondly, it can modify (修饰) verbal communication. Loudness and tone of voice is an example here. Thirdly it regulates (约束) social interaction: taking turns is largely governed by non-verbal signals. Fourthly it conveys (表达) our emotions. Finally it conveys our attitude towards ourselves and towards the people we are communicating with. This is particularly important for successful cross-cultural communications. Every culture has its own body language. So in order to achieve a more successful cross-cultural communication, we heed (留意) not only what to say but also how to say it appropriately. Observation shows that a truly bilingual (会说两种语言的) person switches (转换) his body language at the same time he switches languages. 1. The underlined word 'converse' in the second paragraph can be replaced by _____. [     ] A. continue B. communicate C. complain D. compete 2. The underlined word 'This' in the third paragraph refers to _____. [     ] A. the fact that body language serves a variety of purposes B. the fact that body language can modify verbal communication C. the fact that body language can regulate social interaction D. the fact that body language conveys our attitude 3. It is implied that a more successful cross-cultural communication can be achieved _____. [     ] A. if we keep the same body language B. if we verbally express ourselves clearly C. if we change our body language at the same time we change our words D. if we change our body language from time to time 4. Body language varies _____. [     ] A. from year to year B. from culture to culture C. from time to time D. from person to person 5. The best title for the passage is _____. [     ] A. Verbal language B. Body language C. Ways to communicate D. Communication skills