四川省雅安市天全中学2015_2016学年高二英语上学期第11周周练试题.doc
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1、天全中学20152016学年上期高二第11周周考英 语 试 题(满分100分 时间35分钟) 班级: 姓名: 成绩: 第一节:阅读理解(4*2.5=10分)A recent study of ancient and modern elephants has come up with the unexpected conclusion that the African elephant is divided into two distinct(不同的) species.The discovery was made by researchers at York and Harvard Univer
2、sities when they were examining the genetic relationship between the ancient woolly mammoth and mastod on to modern elephantsthe Asian elephant, African forest elephant, and African savanna elephant.Once they obtained DNA sequences (序列)from two fossils (化石), mammoths and mastodons, the team compared
3、 them with DNA from modern elephants. They found to their amazement that modern forest and savanna elephants are as distinct from each other as Asian elephants and mammoths.The scientists used detailed genetic analysis to prove that the African savanna elephant and the African forest elephant have b
4、een distinct species for several million years. The divergence of the two species took place around the time of the divergence of Asian elephants and woolly mammoths. This result amazed all the scientists. There has long been debate in the scientific community that the two might be separate species,
5、 but this is the most convincing scientific evidence so far that they are indeed different species.Previously, many naturalists believed that African savanna elephants and African forest elephants were two populations of the same species, despite the elephants significant size differences. The savan
6、na elephant has an average shoulder height of 3.5 metres while the forest elephant has an average shoulder height of 2.5 metres. The savanna elephant weighs between six and seven tons, roughly double the weight of the forest elephant. But the fact that they look so different does not necessarily mea
7、n they are different species. However the proof lay in the analysis of the DNA.Alfred Roca, assistant professor in the Department of Animal Sciences at the University of Illinois, said, “We now have to treat the forest and savanna elephants as two different units for conservation purposes. Since 195
8、0, all African elephants have been conserved as one species. Now that we know the forest and savanna elephants are two very distinctive animals, the forest elephant should become a bigger priority (优先) for conservation purposes.”1One of the fossils studied by the researchers is that of _Athe Asian e
9、lephant Bthe forest elephant Cthe savanna elephant Dthe mastodon elephant 2The underlined word “divergence”in Paragraph 4 means “_ ”Aevolution Bexhibition Cseparation Dexamination 3The researchers conclusion was based on a study of the African elephants _.ADNA Bheight Cweight Dpopulation4What are Al
10、fred Rocas words mainly about?AThe conservation of African elephants.BThe purpose of studying African elephants.CThe way to divide African elephants into two units.DThe reason for the distinction of African elephants.5Which of the following can be the best title for the passage?ANaturalists Beliefs
11、about ElephantsBAmazing Experiments about ElephantsCAn Unexpected Finding about ElephantsDA Long Scientific Debate about Elephants第二节:完形填空(20*3=60分)My sister,Cathy,who lives in Vancouver,sent me a package full of Christmas gifts. She told me that she had _1_ it in advance to make sure it would arriv
12、e at my house weeks before the _2_.Christmas was drawing near,but no package arrived. Cathy checked the tracking number every _3_ with Canada Post,and every evening she would call me to _4_ if there was any sign of it on our end. The _5_ always started with questions about the package,but twenty min
13、utes later we would still be _6_.We talked about our family,such as parents,our kids and _7_.Of course we also talked about our jobs. We had never made so much _8_for each other!The talk always took us back to the hours we spent together in our childhood.By Christmas Eve we finally had to _9_ the fa
14、ct that the package was _10_lost.On Christmas morning,Cathy got on the phone with everyone in my _11_ and told them what she had sent. Later on,after a big family Christmas dinner,I had forgotten all about the _12_ package when there was a knock on the door. Who could it be at such a time?As I _13_
15、the door,a man was standing there.“I _14_this is yours,”he said,holding a package. Just then I _15_ that it had been delivered to the wrong address,“I just got home from vacation,”he explained,“_16_ I wanted you to have this in time to open for Christmas.” I thanked this _17_stranger for taking so m
16、uch trouble to _18_ this gift to us on Christmas Day,and _19_ thanked God that the package had been lost in the first place.The real gift of that holiday season was the new _20_ to my sister who lives far away from us. It seemed that my sister was just by my side now.1A. booked Bdecorated Cmailed Dl
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