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　　Unit3    同步检测
　　Ⅰ.阅读理解
　　Now many young people are traveling around the world on their own，not because they have no one to travel with，but because they prefer to go alone.
　　Kristina Wegscheider from California first traveled alone when she was at college and believes that it is something everyone should do at least once in their life.“It opens up your mind to new things and pushes you out of your comfort zone.” Wegscheider has visited 46 countries covering all seven continents.
　　In foreign countries，with no one to help you read a map，look after you if you get ill，or lend you money if your wallet is stolen，it is challenging.This is what drives young people to travel alone.It is seen as character building and a chance to prove that they can make it on their own.
　　Chris Richardson decided to leave his sales job in Australia to go traveling last year.He set up a website，The Aussie Nomad，to document his adventures.He says he wished he had traveled alone earlier.“The people you meet，the places you visit，or the things you do，everything is up to you and it forces you to grow as a person，” said the 30­year­old man.
　　Richardson describes traveling alone like “a shot in the arm”，which “ma a more confident person that is ready to deal with anything”．He said，“The feeling of having conquered something on my own is a major part of what drives me each day when I’m dealing with a difficult task.”“I walnd with my head up because I know deep down inside that nothing is impossible if you try.”
　　The great 19th century explorer John Muir once said，“Only by going alone in silence can one truly get into the heart of the wilderness.”
　　【文章大意】　文章介绍了单独旅行的好处、挑战以及感受。
　　1．Which of the following will Kristina Wegscheider agree with?
　　A．Traveling alone is a necessary experience for everyone.
　　B．It is more meaningful to travel in foreign countries.
　　C．It is comfortable to travel around without a friend.
　　D．Traveling abroad helps people to find new things.
　　解析：选A。细节理解题。根据文章第二段中的“it is something everyone should do”可知答案为A。
　　2．Traveling alone is challenging because ________．
　　A．you have to make things on your own
　　B．it is hard for you to prove yourself to others
　　C．you can only depend on yourself whatever happens
　　D．it will finally build your character
　　解析：选C。细节理解题。根据文章第三段的第一句话“在国外，没有人帮你看地图，你生病的时候没有人照顾你，你钱包被偷的时候没有人借钱给你，这些都是有挑战性的”可知应选C。
　　3．What can we infer about Chris Richardson?
　　A．He started traveling alone at an early age.
　　B．He was once shot in the arm.
　　C．He used to work as a salesman.
　　D．His website inspires others a lot.
　　解析：选C。推理判断题。根据文章第四段的第一句话可知A项错误，而C项正确。根据第五段的第一句话可知B项错误，文章中用的是比喻的修辞手法，并不是胳膊上真的中了一枪；D项文中未涉及。故答案为C。
　　4．What is the best title for the passage?
　　A．Travel Abroad
　　B．Travel Unaccompanied
　　C．Travel Light
　　D．Travel Wide and Far
　　解析：选B。主旨大意题。根据文章第一段中的“traveling around the world on their own”以及下文多次出现的alone一词可知，B项最适合作文章标题，其中unaccompanied“无人陪伴的”与alone同义。故答案为B。
　　Ⅱ.七选五补缺题
　　There is an English saying：“1.________”Until recently，few people took the saying seriously.Now，however，doctors have begun to look into laughter and the effects it has on the human body.2.________
　　Tests were carried out to study the effects of laughter on th