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1、|1-Hi, Im Peter. Are you new here? I havent seen you around？-Hello, Peter. Im Bob. I just_on Monday.A. start B. have started C. started D. had started2. _we dont stop climate change, many animals and plants in the world will be gone.A. Although B. While C. If D. Until3. _along the old Silk Road is a
2、n interesting and rewarding experienceA. Travel B. Traveling C. Having traveled D. Traveled4. Susan had quit her well-paid job and _as a volunteer in the neighborhood. when I visited her last yearA. is working B. was working C. has worked D. had worked5. She and her family bicycle to work, _helps th
3、em keep fitA. which B. who C.as D. that6. During the Mid-Autumn Festival, family members often gather together _a meal, admire the moon and enjoy moon cakes.A. share B. to share C. having shared D. shared7. Chinas high-speed railways _ from 9,000 to 25,000 kilometers in the past few years.A. are gro
4、wing B. have grown C. will grow D. had grown8. In any unsafe situation, simply _ the button and a highly-trained agent will get you the help you need.A. press B. to press C. pressing D. pressed9. A rescue worker risked his life saving two tourists who _in the mountains for two days.A. are trapping B
5、. have been trappedC. were trapping D. had been trapped10. Ordinary soap, _correctly, can deal with bacteria effectively.A. used B. to use C. using D. use11. Without his support, we wouldnt be _we are now.A. how B. when C. where D. why12. In todays information age, the loss of data _cause serious pr
6、oblems for a company.A. need B. should C. can D. must13. They might have found a better hotel if they _a few more kilometers.A. drove B. would drive C. were to drive D. had driven14.-Good morning, Mr. lees office.-Good morning. Id like to make an appointment _next Wednesday afternoon.A. for B. on C.
7、 in D. at15. This is _my father has taught me-to always face difficulties and hope for the best.A. how B. which C. that D. what|The Homeless HeroFor many，finding an unattended wallet filled with 400 in cash would be a source（来源）of temptation（诱惑）.But the 16 would no doubt be greater if you were livin
8、g on the streets with little food and money. All of this makes the actions of the homeless Tom Smith 17 more remarkable.After spotting a 18 on the front seat inside a parked car with its window down，he stood guard in the rain for about two hours waiting for the 19 to return.After hours in the cold a
9、nd wet, he 20 inside and pulled the wallet out hoping to find some ID so he could contact（联系）the driver， only to 21 it contained 400 in notes， with another 50 in spare change beside it.He then took the wallet to a nearby police station after 22 a note behind to let the owner know it was safe. When t
10、he cars owner John Anderson and his colleague Carol Lawrence returned to the car-which was itself worth 35，000 in Glasgow city centre， they were 23 to find two policemen standing next to it. The policemen told them what Mr. Smith did and that the wallet was 24 .The pair were later able to thank Mr.
11、Smith for his 25 .Mr. Anderson said：“I couldnt believe that the guy never took a penny. To think he is sleeping on the streets tonight 26 he could have stolen the money and paid for a place to stay in. This guy has nothing and 27 he didnt take the wallet for himself；he thought about others 28 its un
12、believable. It just proves there are 29 guys out there.”Mr. smiths act 30 much of the publics attention. He also won praise from social media users after Mr. Anderson 31 about the act of kindness on Facebook.Now Mr. Anderson has set up an online campaign to 32 money forMr. Smith and other homeless p
13、eople in the area, which by yesterday had received 8,000. “I think the faith that everyone has shown 33 him has touched him. People have been approaching him in the street; hes ha I job 34 and all sorts, ”Mr. Anderson commented.For Mr. Smith, this is a possible life-changing 35 . The story once agai
14、n tells us that one good turn deserves another.16.A. hope B. aim C. urge D. effort17.A. still B. even C. ever D. once18.A. wallet B. bag C. box D. parcel19.A. partner B. colleague C. owner D. policeman20. A. turned B. hid C. stepped D. reached21.A. discover B. collect C. check D. believe22.A. taking
15、 B. leaving C. reading D. writing23.A. satisfied B. excited C. amused D. shocked24. A. safe B. missing C. found D. seen25.A. service B. support C. kindness D. encouragement26. A. when B. if C. where D. because27. A. rather B. yet C. already D. just28.A. too B. though C. again D. instead29.A. honest
16、B. polite C. rich D. generous30.A. gave B. paid C. cast D. drew31.A. learned B. posted C. cared D. heard32.A. borrow B. raise C. save D. earn33.A. of B. at C. for D. in34.A. details B. changes C. offers D. applications35.A. lesson B. adventure C. chance D. challenge|AMy First Marathon(马拉松)A month be
17、fore my first marathon, one of my ankles was injured and this meant not running for two weeks, leaving me only two weeks to train. Yet, I was determined to go ahead.I remember back to my 7th year in school. In my first P.E. class, the teacher required us to run laps and then hit a softball. I didnt
18、do either well. He later informed me that I was“ not athletic”.The idea that I was “not athletic“ stuck with me for years. When I started running in my 30s，I realized running was a battle against myself, not about competition or whether or not I was athletic. It was all about the battle against my o
19、wn body and mind. A test of wills!The night before my marathon, I dreamt that I couldnt even find the finish line. I woke up sweating and nervous, but ready to prove something to myself.Shortly after crossing the start line, my shoe laces (鞋带)became untied. So I stopped to readjust. Not the start I
20、wanted！At mile3, I passed a sign:“ GO FOR IT, RUNNERS!”By mile 17, I became out of breath and the once injured ankle hurt badly. Despite the pain, I stayed the course walking a bit and then running again.By mile 21, I was starving！As I approached mile 23, I could see my wife waving a sign. She is my
21、 biggest fan. She never minded the alarm clock sounding at 4 a.m. or questioned my expenses on running.I was one of the final runners to finish. But I finished! And I got a medal. In fact, I got the same medal as the one that the guy who came in first place had.Determined to be myself, move forward,
22、 free of shame and worldly labels(世俗标签)， I can now call myself a “marathon winner”.36. A month before the marathon, the author .A. was well trained B. felt scared C. made up his mind to run D. Lost hope37. Why did the author mention the P.E. class in his 7th year?A. To acknowledge the support of his
23、 teacher.B. To amuse the readers with a funny story.C. To show he was not talented in sports.D. To share a precious memory.38. How was the authors first marathon?A. He made it.B. He quit halfway.C. He got the first prize.D. He walked to the end.39. What does the story mainly tell us?A. A man owes hi
24、s success to his family support.B. A winner is one with a great effort of will.C. Failure is the mother of success.D. One is never too old to learn.|BFind Your Adventure at the Space and Aviation (航空)CenterIf youre looking for a unique adventure, the Space and Aviation Center(SAC)is the place to be.
25、 The Center offers programs designed to challenge and inspire with hands-on tasks and lots of fun.More than 750,000 have graduated from SAC, with many seeking employment in engineering, aviation, education, medicine and a wide variety of other professions. They come to camp, wanting to know what it
26、is like to be an astronaut or a pilot, and they leave with real-world applications for what theyre studying in the classroom.For the trainees，the programs also offer a great wayto earn merit badges(荣誉徽章). At Space Camp, trainees can earn their Space Exploration badge as they build and fire model roc
27、kets, learn about space tasks and try simulated (模拟) flying to space with the crew from all over the world. The Aviation Challenge program gives trainees the chance to earn their Aviation badge. They learn the principles of flight and test their operating skills in the cockpit(驾驶舱)of a variety of fl
28、ight simulators. Trainees also get a good start on their Wilderness Survival badge as they learn about water-andland-survival through designed tasks and their search and rescue of “downed“ pilot.With all the programs, teamwork is key as trainees learn the importance of leadership and being part of a
29、 bigger task.All this fun is available for ages 9 to 18. Families can enjoy the experience together, too, with Family Camp programs for families with children as young as 7.Stay an hour or stay a week-there is something here for everyone!For more details，please visit us online at .40. Why do people
30、come to SAC?A. To experience adventures.B. To look for jobs in aviation.C. To get a degree in engineering.D. To learn more about medicine.41. To earn a Space Exploration badge, a trainee needs to .A. fly to space.B. get an Aviation badge first.C. study the principles of flight.D. build and fire mode
31、l rockets.42. What is the most important for trainees?A. Leadership.B. Team spirit.C. Task planning.D. Survival skills.|CPlastic-Eating WormsHumans produce more than 300 million tons of plastic every year. Almost half of that winds up in landfills(垃圾填埋场 )， and up to 12 million tons pollute the ocean
32、s. qSo far there is no effective way to get rid of it, but a new study suggests an answer may lie in the stomachs of some hungry worms. Researchers in Spain and England recently found that the worms of the greater wax moth can break down polyethylene, which accounts for 40% of plastics. The team lef
33、t 100 wax worms on a commercial polyethylene shopping bag for 12 hours, and the worms consumed and broke down about 92 milligrams, or almost 3% of it. To confirm that the worms chewing alone was not responsible for the polyethylene breakdown, theresearchers made some worms into paste(糊状物) and applie
34、d it to plastic films. 14 hours later the films had lost 13% of their mass-apparently broken down by enzymes(酶)from the worms stomachs. Their findings were published in Current Biology in 2017.Federica Bertocchini, co-author of the study, says the worms ability to break down their everyday food-bees
35、wax-also allows them to break down plastic “Wax is a complex mixture, but the basic bond in polyethylene, the carbon-carbon bond, is thereas well, “she explains. “The wax worm evolved a method or system to break this bond. “Jennifer Debruyn, a microbiologist at the University of Tennessee, who was n
36、ot involved in the study, says it is not surprising that such worms can break down polyethylene. But compared with previous studies, she finds the speed of breaking down in this one exciting. The next step, DeBruyn says, will be to identify the cause of the breakdown. Is it an enzyme produced by the
37、 worm itself or by its gut microbes(肠道微生物)?Bertocchini agrees and hopes her teams findings might one day help employ the enzyme to break down plastics in landfills. But she expects using the chemical in some kind of industrial process-not simply “millions of worms thrown on top of the plastic.”43. W
38、hat can we learn about the worms in the study?A. They take plastics as their everyday food.B. They are newly evolved creatures.C. They can consume plastics.D. They wind up in landfills.44. According to Jennifer DeBruyn, the next step of the study is to .A. identify other means of the breakdownB. fin
39、d out the source of the enzymeC. confirm the research findingsD. increase the breakdown speed45. It can be inferred from the last paragraph that the chemical might .A. help to raise wormsB. help make plastic bagsC. be used to clean the oceansD. be produced in factories in future46. What is the main
40、purpose of the passage?A. To explain a study method on worms.B. To introduce the diet of a special worm.C. To present a way to break down plastics.|D. To propose new means to keep eco-balance.DPreparing Cities for Robot CarsThe possibility of self-driving robot cars has often seemed like a futurists
41、 dream, years away from materializing in the real world. Well, the future is apparently now. The California Department of Motor Vehicles began giving permits in April for companies to test truly self-driving cars on public roads. The state also cleared the way for companies to sell or rent out self-
42、driving cars, and for companies to operate driverless taxi services. California, it should be noted, isnt leading the way here. Companies have been testing their vehicles in cities across the country. Its hard to predict whendriverless cars will be everywhere on our roads. But however long it takes,
43、 the technology has the potential to change our transportation systems and our cities, for better or for worse, depending on how the transformation is regulated.While much of the debate so far has been focused on the safety of driverless cars(and rightfully so), policymakers also should be talking a
44、bout how self-driving vehicles can help reduce traffic jams, cut emissions(排放) and offer more convenient, affordablemobility options. The arrival of driverless vehicles is a chance to make sure that those vehicles are environmentally friendly and more shared.Do we want to copy- or even worsen- the t
45、raffic of today with driverless cars? Imagine a future where most adults own individual self-driving vehicles. They tolerate long, slow journeys to and from work on packed highways because they can work, entertain themselves or sleep on the ride, which encourages urban spread. They take their driver
46、less car to an appointment and set the empty vehicle to circle the building to avoid paying for parking. Instead of walking a few blocks to pick up a child or the dry cleaning, they send the self-driving minibus. The convenience even leads fewer people to take public transportan unwelcome side effec
47、t researchers have already found in ride- hailing(叫车 ) services.A study from the University of California at Davis suggested that replacing petrol-powered private cars worldwide with electric, self-driving and shared systems could reduce carbon emissions from transportation 80% and cut the cost of t
48、ransportation infrastructure(基础设施) and operations40%by2050. Fewer emissions and cheaper travel sound pretty appealing. The first commercially available driverless cars will almost certainly be fielded by ride-hailing services, considering the cost of self-driving technology as well as liability and
49、maintenance issues(责任与维护问题).But driverless car ownership could increase as the prices drop and more people become comfortable with the technology.Policymakers should start thinking now about how to make sure the appearance of driverless vehicles doesnt extend the worst aspects of the car-controlled transportation system we have today. The coming technological advancement presents