Complete the following paragraph with words from the word bank. You may not use any of the words more than once. (填单词的序号，不填单词)Humans perceive social distance, mentally and physically. Two extremes can be 1) __________: untouchability and disconcerting closeness. In some nations, such as Nepal, there seems to be little 2)_____________ of privacy. Comparatively, people in Britain 3) __________ their distance rigidly and strictly, whether the relationship is 4) _________ or distant. As times change, some customs, such as kissing and hugging, have 5) _______ globally. Choosing an appropriate greeting gesture can be confusing across 6) _______ . Greeting gestures are highly culture-specific and may change within a culture according to social status and relationship. A handshake 7) __________ friendship and is believed by some to have originated as a gesture of peace from prehistory. It aims at 8) _______ the distance, while also conveying trust and 9) __________ mutual independence. To love and to be loved, to give and to receive, to offer and to take, these are the things we expect to experience in a good relationship. Being social animals, humans naturally 10) _________ such moments of physical contacts, and welcome the proof that we are not alone.