例： it's so nice to hear from her again＿＿，we last met more than thirty years ago.
A. what's more
B. That’s to say
C. In other words
D. Believe it or not
- -Hi, I'm Peter. Are you new here? I haven't seen you around？
-Hello, Peter. I'm Bob. I just＿＿on Monday.
B. have started
D. had started
2. ＿＿we don't stop climate change, many animals and plants in the world will be gone.
3. ＿＿along the old Silk Road is an interesting and rewarding experience
C. Having traveled
4. Susan had quit her well-paid job and ＿＿as a volunteer in the neighborhood. when I visited her last year
A. is working
B. was working
C. has worked
D. had worked
5. She and her family bicycle to work, helps them keep fit
6. During the Mid-Autumn Festival, family members often gather together＿＿a meal, admire the moon and enjoy moon cakes.
B. to share
C. having shared
7. China's high-speed railways from 9,000 to 25,000 kilometers in the pastfew years.
A. are growing
B. have grown
C. will grow
D. had grown
8. In any unsafe situation, simply＿＿the button and a highly-trained agent will get you the help you need.
B. to press
9. A rescue worker risked his life saving two tourists who＿＿in the mountains for two days.
A. are trapping
B. have been trapped
C. were trapping
D. had been trapped
10. Ordinary soap, ＿＿correctly, can deal with bacteria effectively.
B. to use
11. Without his support, we wouldn't be＿＿we are now.
12. In today's information age, the loss of data＿＿cause serious problems for a company.
13. They might have found a better hotel if they＿＿a few more kilometers.
B. would drive
C. were to drive
D. had driven
14.-Good morning, Mr. lee's office.
-Good morning. I'd like to make an appointment＿＿next Wednesday afternoon.
15. This is＿＿my father has taught me-to always face difficulties and hope for the best.
The Homeless Hero
For 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 living 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 and 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 the car’s 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. Smith for his 25 .
Mr. Anderson said：“"I couldn’t 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 didn't take the wallet for himself；he thought about others 28 it’s unbelievable. It just proves there are 29 guys out there.”
Mr. smith’s act 30 much of the public’s 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 for
Mr. Smith and other homeless people 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; he's ha I job 34 and all sorts, ”Mr. Anderson commented.
For Mr. Smith, this is a possible life-changing 35 . The story once again tells us that one good turn deserves another.
My First Marathon(马拉松)
A month before 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 didn't 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 own body and mind. A test of wills!
The night before my marathon, I dreamt that I couldn't 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 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 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, 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 hope
37. Why did the author mention the P.E. class in his 7th year?
A. To acknowledge the support of his 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 author's 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 his 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.
Find Your Adventure at the Space and Aviation (航空)Center
If you're looking for a unique adventure, the Space and Aviation Center(SAC)is the place to be. 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 is like to be an astronaut or a pilot, and they leave with real-world applications for what they're studying in the classroom.
For the trainees，the programs also offer a great way
to earn merit badges(荣誉徽章). At Space Camp, trainees can earn their Space Exploration badge as they build and fire model rockets, 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 flight simulators. Trainees also get a good start on their Wilderness Survival badge as they learn about water-and
land-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 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 www.oursac.com.
40. Why do people 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 model rockets.
42. What is the most important for trainees?
B. Team spirit.
C. Task planning.
D. Survival skills.
Humans 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 oceans. 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 left 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, the
researchers made some worms into paste(糊状物) and applied 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-beeswax--also allows them to break down plastic "Wax is a complex mixture, but the basic bond in polyethylene, the carbon-carbon bond, is there
as 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 not 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 worm itself or by its gut microbes(肠道微生物)?
Bertocchini agrees and hopes her team’s 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. What 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 breakdown
B. find out the source of the enzyme
C. confirm the research findings
D. increase the breakdown speed
45. It can be inferred from the last paragraph that the chemical might .
A. help to raise worms
B. help make plastic bags
C. be used to clean the oceans
D. be produced in factories in future
46. What is the main 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.
Preparing Cities for Robot Cars
The possibility of self-driving robot cars has often seemed like a futurist's 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-driving cars, and for companies to operate driverless taxi services. California, it should be noted, isn't leading the way here. Companies have been testing their vehicles in cities across the country. It's hard to predict when
driverless cars will be everywhere on our roads. But however long it takes, 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 about how self-driving vehicles can help reduce traffic jams, cut emissions(排放) and offer more convenient, affordable
mobility 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 traffic 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 driverless 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 transport——an unwelcome side effect 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 transportation 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 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 doesn't extend the worst aspects of the car-controlled transportation system we have today. The coming technological advancement presents a chance for cities and states to develop transportation systems designed to move more people，and
more affordably. The car of the future is coming. We just have to plan for it.
47. According to the author，attention should be paid to how driverless cars can__________.
A. help deal with transportation-related problems
B. provide better services to customers
C. cause damage to our environment
D. make some people lose jobs
48. As for driverless cars，what is the author's major concern？
B. Side effects.
49. What does the underlined word “fielded” in Paragraph 4 probably mean？
50. What is the author's attitude to the future of self-driving cars？
Why Do We Get Angry？
Anger seems simple when we are feeling it， but the causes of anger are various. Knowing these causes can make us examine our behavior，and correct bad habits. The main reasons we get angry are triggering（触发）events，personality traits（特征），and our assessment of situations. 51
Triggering events for anger are so many that to describe them all would take hundreds of pages. However, here are some examples: being cut off in traffic, a deadline approaching, experiencing physical pain, and much more._52 The reason why someone is triggered by something and others are not is often due to one's personal history and psychological traits.
Each person. no matter who they are, has psychological imbalances. People who have personality traits that conncct with competitiveness and low upset tolerance are much more likely to get angry. 53 Also, sometimes pre-anger does not have to do with a lasting condition, but rather a temporary state before a triggering event has occurred.
____54 Sometimes even routine occurrences become sources of pre-anger, or anger itself. Sometimes ignorance and negative (消极的)outlooks on situations can create anger.
____55 However, anger can easily turn violent, and it is best to know the reasons for anger to appear in order to prevent its presence. With these main reasons in mind, we can evaluate our level of anger throughout the day and prevent cases of outbursts by comprehending the reasons for our feelings.
A. Our attitude and viewpoint on situations can create anger within us as well.
B. But some types of situations can help us to get rid of the occurrence of anger.
C. Anger is rarely looked upon as a beneficial character trait, and is usually advised to reduce it.
D. Anger is a particularly strong feeling and maybe people think that they have reasons to feel angry.
E. Having these personality traits implies the pre-anger state, where anger is in the background of your mind.
F. Understanding these reasons will control our own anger if we are willing to evaluate ourselves with a critical eye.
G. Not everyone acts the same in response to events, and that is why what triggers one person may or may not trigger another.