Unit 2 单元测试--高中英语牛津译林版必修第三册.docx

必修第三册 Unit2 单元测试一、阅读理解Endangered polar bears are breeding (繁殖) with grizzly bears (灰熊), creating “pizzly” bears, which is being driven by climate change, scientists say.As the world warms and Arctic sea ice thins, starving polar bears are being forced ever further south, where they meet grizzlies, whose ranges are expanding northwards. And with that growing contact between the two come increasing hybrids (杂交种).With characteristics that could give the hybrids an advantage in warming northern habitats, some scientists guess that they could be here to stay. “Usually, hybrids aren't better suited to their environments than their parents, but these hybrids are able to search for a broader range of food sources, ” Larisa DeSantis, an associate professor of biological sciences at Vanderbilt University, told Live Science.The rise of “pizzly” bears appears with polar bears' decline: their numbers are estimated to decrease by more than 30% in the next 30 years. This sudden fall is linked partly to “pizzly” bears taking up polar bears' ranges, where they outcompete them, but also to polar bears' highly specialized diets.“Polar bears mainly consumed soft foods even during the Medieval Warm Period, a previous period of rapid warming, ” DeSantis said, referring to fat meals such as seals. “Although all of these starving polar bears are trying to find alternative food sources, like seabird eggs, it could be a tipping point for their survival. ” Actually, the calories they gain from these sources do not balance out those they burn from searching for them. This could result in a habitat ready for the hybrids to move in and take over, leading to a loss in biodiversity if polar bears are replaced.“We're having massive impacts with climate change on species, ” DeSantis said. “The polar bear is telling us how bad things are. In some sense, “pizzly” bears could be a sad but necessary compromise given current warming trends. ”1.Why do polar bears move further south?A.To create hybrids.B.To expand territory.C.To relieve hunger.D.To contact grizzlies.2.What makes “pizzly” bears adapt to natural surroundings better than their parents?A.Broader habitats.B.More food options.C.Climate preference.D.Improved breeding ability.3.What does the underlined phrase “a tipping point” in paragraph 5 refer to?A.A rare chance.B.A critical stage.C.A positive factor.D.A constant change.4.What's the main idea of the text?A.Polar bears are changing diets for climate change.B.Polar bears have already adjusted to climate change.C.“Pizzly” bears are on the rise because of global warming.D.“Pizzly”bears have replaced polar bears for global warming.二、完形填空Janes mother was busy with her work on the farm every day to make ends meet while Jane was studying at school, so they had little time to enjoy themselves.One day, she realized Jane was unhappy and even _5_to her, so she decided to go _6_with Jane to make Jane happy. On a Sunday morning they went happily to the snowfield. Since they were _7_in white clothes, the manager advised them to buy ski clothes. He said in case there was an accident, they might be easily _8_ in the ski clothes. They couldnt _9_ them, so she refused. Then they went skiing in their white clothes. They were skiing happily on the snowfield when suddenly the snowfield began to_10_. It was an avalanche(雪崩). They ran a long way and _11_ the avalanche finally, but they couldnt find their way. Later, a helicopter was flying above, _12_ people on it couldnt see or hear them. Jane was _13_ because she had hurt her head seriously and _14_dropped on the snow. Just then an idea struck her mother. She pierced(刺破) her own wrist_15_ and let bright red blood drop on the snow. A red SOS was written. At last Jane _16_, but her mother died. Every time I _17_the blood dropping on the snow, I feel _18_. I believe anyone who hears the tragedy will _19_ Janes mother for her selfless love to her daughter.5.A.unfriendlyB.loyalC.kindD.cruel6.A.skatingB.dancingC.hikingD.skiing7.A.allB.bothC.eitherD.every8.A.searchedB.examinedC.foundD.caught9.A.payB.manageC.affordD.stand10.A.changeB.meltC.jumpD.shake11.A.passedB.escapedC.experiencedD.overcame12.A.soB.butC.sinceD.while13.A.in vainB.in dangerC.in peaceD.in ruins14.A.bloodB.hairC.tearsD.jewels15.A.slowlyB.carefullyC.hardlyD.immediately16.A.criedB.diedC.survivedD.woke17.A.find outB.think ofC.suffer fromD.come across18.A.satisfiedB.curiousC.anxiousD.painful19.A.admireB.envyC.rewardD.thank三、用单词的适当形式完成短文阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。The awful night rolled slowly away, and the dawn greyly broke on THE LAST DAY OF POMPEII! The crowd looked upwards, and saw, with unspeakable fear, a huge cloud _20_ (shoot) from the top of the volcano. It took the form of _21_ huge tree: the trunk, blackness, the branches, fire! This fire moved and changed in colour with every moment: now it was wildly bright, now of a pale and dying red, and now again it burnt with an _22_ (bear) light! The cries of women broke out; the man looked at each other, silent. At that moment, they felt the earth shaking _23_ their feet; beyond in the distance, they heard the crash of falling _24_ (roof). A moment later, the mountaincloud seemed to roll towards them, dark and rapid, like a river; at the same time, it threw out a shower of ashes and huge pieces of _25_   (burn) stone! Over the empty streetsover the forumfar and widewith many a noise crash in the stormy sea _26_ (fall) that awful shower! Each turned _27_ (fly)each running, pressing, pushing against the other. If, in the darkness, wife _28_ (separate) from husband, or parent from child, there was no hope of their meeting again. Each hurried blindly and _29_ (fear) on. So came the earthquake. . . and so ended life in Pompeii.四、根据首字母填写单词30.The society was set up to p_endangered species from extinction. 31.The beach is within walking d_of my house. 32.Chest pains can be a warning s_ of heart problems.33.I always read her c_in the local paper. 34.Many people are still in the water, waiting to be r_. 35.The drug was used to promote sleep and r_ pain. 36.Of the six people i_ in the crash, only two survived.37.My father e_into fury (勃然大怒).38.Hurry up, o_ we will be late for class. 39.Up to 12 survivors are believed to have been r_ from the fire so far. 五、根据汉语意思填写单词40.To _(保证，确保) everyones safety, the authority conducted rounds of nucleic acid testing. 41.I am _(好奇的) about the astronauts six-month stay on Shenzhou XIII Spaceship. 42.She stormed out of the room and _ (撞击) the door shut behind her. 43.The worlds_ (热带的) forests are disappearing at an even faster rate than expected. 44.According to their neighbours, there was something_ (怪异的) about the family. 45.Smile shortens the _(距离) between people and it is a good way to show your friendliness to others. 46.What is the usual _ (程序) for setting up a new school? 47.In this film, a group of young men spent many years _ (挖掘) buried treasures but in vain. 48.Under the guidance of the teachers, the students went out of the building in an_ (守秩序的) way. 49.They were eager to reach their_(目的地) before lunchtime. 4学科网（北京）股份有限公司