[考研类试卷]考研英语二(完形填空)模拟试卷108及答案与解析.doc
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1、考研英语二(完形填空)模拟试卷 108 及答案与解析一、Section I Use of EnglishDirections: Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D. (10 points) 0 When Neil Armstrong and Buzz Aldrin returned from the moon, their cargo included nearly fifty pounds of rock and soil, which w
2、ere packed in an aluminum box with seals designed to maintain the lunar surfaces low-pressure environment. But back at Johnson Space Center, in Houston, scientists discovered that the seals had been【C1】_by moon dust.Lunar dust is fine, like a powder,【C2 】_it cuts like glass. Its formed when shooting
3、 stars【C3】_on the moons surface, heating its rocks and dirt and reducing them to fine particles. Since theres no wind or water to smooth【C4 】 _edges, the tiny grains are sharp and uneven, and【C5】_nearly everything.“The intruding【C6】_of lunar dust represents a more challenging engineering design issu
4、e, as well as a【C7】_issue for settlers, than does radiation,“ wrote Harrison Schmitt, an Apollo 17 astronaut, in his 2006 book, “Return to the Moon.“ The dust damaged space-suits and ate away layers of moon boots. Over the【C8】_of six Apollo missions, not one rock box【C9】_its vacuum seal. Dust follow
5、ed the astronauts back into their ships, too. According to Schmitt, it smelled like gunpowder and made breathing【C10】_. No one knows precisely what the extremely small particles do to human lungs.The dust not only【C11】_the moons surface, but floats up to sixty miles【C12】_itas an outer part of its at
6、mosphere, where particles【C13】_the moon by gravity, but are so thin that they【C14】_collide. In the nineteen-sixties, Surveyor probes filmed a glowing cloud floating just above the lunar surface during sunrise. Later, Apollo 17 astronaut Gene Cernan, while orbiting the moon, recorded a【C15】_phenomeno
7、n at the sharp line where lunar day meets night. Cernan【C16】_a series of pictures illustrating the changing【C17】_; streams of particles popped【C18】_the ground and hovered, and the resulting cloud came into sharper focus as the astronauts orbiter approached daylight. Since theres no wind to form and【
8、C19】_the clouds, their origin is something of a mystery. Its【C20】_that theyre made of dust, but no one fully understands how or why they do their thing.1 【C1 】(A)destroyed(B) stained(C) changed(D)consolidated2 【C2 】(A)because(B) and(C) but(D)so3 【C3 】(A)hang .(B) crash(C) land(D)move4 【C4 】(A)soft(B
9、) hard(C) rough(D)flat5 【C5 】(A)search for(B) put out(C) turn down(D)cling to6 【C6 】(A)nature(B) speed(C) degree(D)direction7 【C7 】(A)intelligence(B) health(C) fund(D)future8 【C8 】(A)moment(B) situation(C) course(D)program9 【C9 】(A)installed(B) lost(C) found(D)maintained10 【C10 】(A)even(B) fast(C) d
10、ifficult(D)comfortable11 【C11 】(A)coats(B) affects(C) protects(D)crusts12 【C12 】(A)above(B) across(C) on(D)through13 【C13 】(A)are attracted to(B) are bound to(C) are confronted with(D)are charmed with14 【C14 】(A)frequently(B) violently(C) gently(D)rarely15 【C15 】(A)strange(B) similar(C) common(D)dif
11、ferent16 【C16 】(A)sketched(B) described(C) received(D)copied17 【C17 】(A)landscape(B) feature(C) scene(D)mode18 【C18 】(A)out(B) in(C) off(D)down19 【C19 】(A)disperse(B) dye(C) cover(D)sustain20 【C20 】(A)presumed(B) doubted(C) proved(D)hoped20 Mammals vary enormously in size, from weighing less than a
12、penny to measuring more than three school buses in length. Some groups of mammals have become very large, such as elephants and whales,【C1】_others have always been small, like primates. A new theory developed by an international team, led by Jordan Okie,【C2】_an explanation for why and how【C3】_groups
13、 of organisms are able to evolve【C4】_sizes, whereas others are not.The research team【C5】 _information on how quickly an individual animal grows and used it to【C6 】_how large it may get【C7】_evolutionary time. Their research was published recently.The new theory developed from the observation that som
14、e animals【C8】_fast and die young, while others take their time and mature much later. “Fast“ animals-such as micebreed very quickly, while humans mature slowly and are relatively older when they first have children. The theory【C9】_that those species that are relatively faster are more likely to evol
15、ve a large size quicker than slow species, and that their maximum size will be greater.The research team tested their theory using the【C10】_records of mammals over the last 70 million years, examining the maximum size of each mammal group【 C11】_that time, including whales, elephants, seals and prima
16、tes. They found that their theory was very well【C12】_.“Primates have evolved very slowly, and never got bigger than 1,000 pounds,“ said Okie, “The【C13 】_was true of whales, which evolved their large size at the fastest【C14 】_recorded.“The theory also makes predictions about the relative risks of ext
17、inction for large animals【C15】_small. The maximum size of an animal is limited by the rate of mortality in the【C16】_. Because larger animals【C17】_breed less frequently than smaller animals,【C18】_the mortality rate doubles, the maximum size is predicted to be 16 times smaller.“This is a really surpri
18、sing【C19】_,“ said Okie. “It points to another reason why many of the large animals went【C20】_after the last Ice Age, and their high risk of extinction in modern environments.“21 【C1 】(A)because(B) while(C) if(D)and22 【C2 】(A)supply(B) gets(C) provides(D)furnishes23 【C3 】(A)certain(B) exact(C) true(D
19、)accurate24 【C4 】(A)gigantic(B) tiny(C) slim(D)various25 【C5 】(A)found(B) provided(C) processed(D)examined26 【C6 】(A)display(B) predict(C) prove(D)discover27 【C7 】(A)for(B) before(C) over(D)by28 【C8 】(A)live(B) run(C) eat(D)think29 【C9 】(A)promises(B) prescribes(C) recommends(D)proposes30 【C10 】(A)s
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