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语法 1.---a major role in future planetary exploration. (A)Robots will surely play (B)Robots,which will surely play (C)Because robots will surely be playing (D)Surely robots,which will be playing 2.Unlike the owl,bats cannot see very well,but they do have---. (A)it hears very well (B)very good to hear (C)tearing very well (D)very good hearing 3.Comparatively few clues in the United Slates1 have competing newspapers today,a major change from 1900---more than two newspapers. (A)because then most large cities having (B)when did most large cities have (C)then most large cities that had (D)when most large cities had 4.Witch hazel extract,---distilled from the bark and twigs2 of the witch hazel shrub,has been utilized3 in medicine. (A)is (B)when to be (C)which is (D)has been 5.---touching in O.Henry's stories is the gallantry with which ordinary people struggle to maintain their dignity. (A)Most is (B)It mostly is (C)Is it most (D)What is most 6.The face of the Moon is changed by collisions with meteoroids,---new craters4 to appear. (A)cause (B)causing (C)caused (D)have cause 7.Social scientists believe that ---from sounds such as grunts5 and barks made by early ancestors of human beings. (A)the very slow development of language (B)language developed very slowly (C)language which,,was very slow to develop (D)language,very slowly developing 8.---substances include various forms of silica,pumice,and emery. (B)Abrasion8 occurs in natural (C)Naturally occurring abrasive6 (D)A natural occurrence of abrasion 9.---in the upper part of their long1thin legs all9w deer to run swiftly and jump far. (A)Muscles are powerful (B)There are powerful muscles (C)The powerful muscles that (D)Powerful muscles 10.Geophysicists have collaborated9 with archaeologists and anthropologists to study the magnetic properties of pottery10 and fireplaces at sites -----by early humans. (A)occupied (B)occupying (C)which occupy (D)were occupied 11.---technically proficient;it also explores psychological questions. (A)Not only is Barbara Astman's artwork (B)Not only Barbara Asiman's artwork (C)Barbara Astman1s artwork,,which is not only (D)Barbara Astman's artwork not only 12.Although Canada's Parliament can neither administer or enforce laws initiate11 policy,it does have the power to make laws and vote on the allocation of funds. (A)not (B)nor (C)and (D)either 13.Willa Cather considered her novel of life in nineteenth-century Nebraska,My Antonia,--- (A)was her best work (B)her best work (C)her best work it was (D)being her best work 14.First designated in 1970,Earth Day has become an annual international event concerns about environmental issues such as pollution. (A)dedicated to raising (B)dedicated raising (C)dedicates to raise (D)that dedicates to raising 15.In 1992Albert Gore,Jr.,the son of a former United States senator,became Vice12 President of the United States. (A)who was the forty-fifth (B)and the forty-fifth (C)the forty-fifth (E)he was the forty-fifth 16.Although Christopher Columbus failed in his original goal,the discoveries he A B did make were as Important than the route to Asia he expected to find. C D 17.Martha Graham,a leading figure in modern dance,made she debut13 in A B C 1920with the Denishawn School. D 18.In the United States,the federal government is responsible to regulating the A B working conditions in factories. C D 18.Jupiter is a gaseous14 planet with.an atmosphere composed most of A B C hydrogen and helium. D 20.Throughout her career Georgia O'Keeffe paid meticulous15 attention to her craft; A B her brushes were always clean,her colors fresh and brightness. C D 21.Hydrogen the nine most abundant element in the Earth's crust,is an odorless, A B C colorless,and tasteless gas. D 22.Salamanders are frequently to be find in moist,wooded areas. A B C D 23.Steam engines have been replaced in most cases by more economical and A B C efficiency devices,such as the electric motor. D 24.Traditionally,the Fourth of July is celebrated16 in the United States with political A B speeches,picnics,and most important of all,a displayed of fireworks at night. C D 25.The style of used in cartoon animation17 range from relatively18 realistic A B C representations of everyday life to the most romantic and impossible fantasy. D 26.Ordinary beaver19 dams vary in length from a few feet to a hundred feel or A B C more than. D 27.In the United State,presidential elections are held once every four year. A B C D 28.Except of the freehand toe,the feet of the gull20 are fully21 webbed. A B C D 29.Teaching machines are devices that can store instructionally information, A present displays,receive responses from a learner,and act on those responses. B C.D 30.Challotte Perkins Gilman Is known primarily as an author of short stories, A B but she also wrote an influential22 book argued for equal economic opportunities for C D women. 31.In some areas of the United States,unfavorable climate or soil make farming A B C an impossible task. D 32.Naturalists23 have identified at least four hundred of species of mammals and A B six hundred types of birds in the state of California. C D 33.Instead of tooth,the blue whale has a row of bony plates in its mouth A B C that functions as a food-collecting device. D 34.Murres are black-and-white driving birds that mate every five or six years and A lay only a single egg at time. B C D 35.A bar code consists a pattern of lines and bars that a computer can translate A B C into information. D 36.Hummingbirds24 are the only birds that can fly to backwards25. A B C D 37.Fluorine,a greenish-yellow gas that is slightly heavy than air is poisonous A B C and corrosive26 and has a penetrating27 and disagreeable odor. D 38.The Everglades,a large swamp area is an unique wilderness28 extending over A B C much of southern Florida. D 39.Each year millions of tons of fertile topsoil that could produce good crops A B C washed away by rains. D 40.Since the 1950's,folk'music has had a significant influence on many popular A B C D vocal and instrumental music 点击  收听单词发音
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