根据下面内容，回答题：

　　In Japan's capital city of Tokyo, earthquake danger limits the height of buildings. The city hasspread out so far and the traffic has become so heavy that it is very difficult to get from one place toanother. The price of land,too,has become very high. All this explains why a group of Japanese landdevelopers came to the conclusion that there was nowhere to go but down. So far they have dug outspace underground for fifteen major shopping centers ,and the underground construction has only begun.What are some of the advantages of shopping and eating underground? Clean ,filtered( ~,,1~ )air is one of them. The city of Tokyo has one of the most serious smog problems in the world. An other advantage is that there won't be traffic accidents as that on the city's busy streets. Still another is the convenience of moving from place to place. You're usually right next to, or even in, a subway station.And you can even spend the night underground if you like. The Kyobashi Station, for example, indown town Tokyo, has a hotel with a bar, restaurant and barbershop.

　　44It is very difficult to get from one place to another in Tokyo because __________.

　　A.the city is so large and so highB.there is no trafficC.we don't know the roadD.the city is so large and the traffic is so heavy

　　参考答案：D

　　参考解析：

　　文中第二句中指出原因即城市太大，交通太拥挤。

　　45All are the seasons for Tokyo to develop underground EXCEPT __________

　　A.the high buildingsB.the high price of landC.the far spreading of the cityD.the heavy traffic

　　参考答案：A

　　参考解析：

　　文中第一段第一句中提到了建筑物的高度是因地震受到限制，因此A项的表述不合适，高大的建筑物并不是东京要向地下发展的原因。

　　46Shopping underground is clean __________ ,.,

　　A.without air pollutionB.of waterC.and tidyD.and beautiful

　　参考答案：A

　　参考解析：

　　文中第二段第二句中提到了地下购物的优点，即干净、空气好。

　　47The second paragraph tells us __________

　　A.underground is convenientB.the advantages of undergroundC.we can have good food undergroundD.you can spend the night underground

　　参考答案：B

　　参考解析：

　　文中第二段具体分析了地下的优点，比如干净、空气好、无交通阻塞问题等。

　　根据下面内容，回答题：

　　The discovery of a dwarfed (矮个的)"human being" who lived in Flores, Indonesia, up to 18,000 years ago is changing the way we think about the human family. This "Flores Human"wasthree foot tall and her brain was smaller than that of the average chimp(黑猩猩) ,yet she and herrelatives apparently lived fully human lives. They seem to have made tools, worked together to findfd and cook it, and perhaps even burried their dead with ceremony.

　　It was a major surprise to find tools associated with the new human family member. The tools arelike those formerly seen only with European fossils (化石)from our own species;Homo sapiens (智人) ;and the oldest of them were made 9,400 years ago. Homo sapiens is thought to have arrived inthe island about 4,000 years ago, much too late to be responsible for the tools. If this tiny humanmade the tools, then the inside structure (结构)of its brain must have been more like our own than a chimp's, despite being just a third the size of ours.

　　This "new human" was suspected to be a dwarfed branch of Homo erectus( 直立人). When crea-tures are separated in regions with rare resources but few enemies, being big is a disadvantage, andevolution tends to shrink them, a process known as island dwafng. Could natural selection make a hu-man smaller while keeping--even improving--mental ability? Quite possibly, believes ChristopherWills of the University of California.

　　Has the "Flores Human" even shown the ability of language? "I find it difficult to imagine thatpeople could make tools, use fire, and kill large animals without fairly advanced communication," Willssays. Did "Flores Human" possess the basic components of human culture--such as the burying of thedead with ceremony? Emiliano Bruner of the Italian Institute points out that Indonesia's hot,wet envi-ronment is bad for fossilization. It is reasonable to assume,he says,that the 18,000-year-old bones ofthe most complete Flores woman were well-preserved because she was buried with special care.

　　48According to the passage," Flores Human"__________ .

　　A.lived a partly human lifeB.was a branch of Homo sapiensC.used tools before Homo sapiens arrivedD.had a brain as large as a common chimp's

　　参考答案：C

　　参考解析：

　　依据在第二段中，比较隐蔽，根据“H0— mo sapiens is thought to have arrived in the island about4，000 years a90，much too late to be responsible for thetools.”可知答案为c项。也可以用排除法，A、B、D三项与文章内容矛盾。

　　49The underlined part "this tiny human" in Paragraph 2 refers to __________ .

　　A.a chimpB.Flores HumanC.Homo sapiensD.Homo erectus

　　参考答案：B

　　参考解析：

　　本文是围绕Flores Human展开的，A、C、D三项都只是说明其中的一部分情况。根据上下文可知B项正确。

　　50This passage mainly talks about __________ .

　　A.the tools made by "Flores Human"B.the language used by "Flores Human"C.the evolution of "Flores Human"D.the major surprising findings about "Flores Human"

　　参考答案：D

　　参考解析：

　　D项把A、B、C三项都概括了。A、B、C三项都是片面的，故最佳答案为D项。

　　51According to the passage, it is believed that "Flores Human"__________ .

　　A.was dwarfed by its enemiesB.could use languageC.left a lot of fossils in the hot and wet environmentD.reached Flores 40,000 years ago

　　参考答案：B

　　参考解析：

　　根据最后一段可知选B项。A、c、D三项的内容均与文章不符。

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