根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
On a mid-September day, British climbers Rachel Kelsey and Jeremy Colenso were climbing in the Swiss Alps.
When they left their base, the weather was good, and they reached the top of the mountain. Snow began to fall, making it difficult to see where they could put their hands and feet on the rock. After several frightening minutes, they found a narrow ledge(岩石架) and climbed on to it, hoping the snow would stop and they could continue to climb down.
“We had to stay awake,” said Rachel, “because it was so cold that we could have died. So we told stories and rubbed our fingers to keep them warm.”
But what could they do? Rachel had brought her mobile phone with her, but all the people she could get in touch with were in London. Still, she sent a text message at 1:30 a.m. to get help. It read: “Need heli rescue off Piz Badile, Switzerland”. At 5:00 a.m., one friend, Avery Cunliffe, got the message. He jumped into action, called the rescue services in Switzerland, and called Rachel to tell her that help was coming.
The weather was too bad for the helicopters to operate, but Avery kept sending text messages to the climbers. “We owe our lives to Avery,” they said when they were back at base.
A. They were both experienced climbers.
B. They decided that they had to get help.
C. They were all asleep, and nothing happened.
D. She sent the same text to five friends in the UK.
E. At about 10:00 p.m. they were lifted off the mountain.
F. The snow did not stop and the temperature dropped to -10℃.
G. But as they started the climb down, a storm struck the mountain.
Experts recently suggested that teens should start adopting early bedtimes. Before you dismiss it as a habit suited only for young kids, consider that there are serious advantages in being well-rested. And now, even more research suggests that putting phones away before going to sleep is important to teens’ well-being.
A new study from Seton Hall University School of Health and Medicine Science found that 62 percent of kids used their smart phones before bed, and it’s causing less sleep and poor performance in school.
Those teens who text(发短信) before bedtime tend to go to sleep later, and get up later in the morning. Such behavior can be associated with mental health issues like depression or anxiety. Besides, once teens do receive a text, experts found, they tend to respond right away. Then the text conversation continues — resulting in an even later bedtime.
The study’s co-author Dr. Peter Polos says this leads to excessive stimulation(过度刺激) at night. Light from electronic devices can block the secretion(分泌) of melatonin — a hormone(荷尔蒙) that promotes sleep, which makes sleep difficult in the face of overuse of smart phones at night. It’s true! More screen time means less sleep time; other studies have suggested the same idea.
As for a final piece of advice, Dr. Sushanth Bhat says, since getting the proper amount of sleep is very important for brain development and learning in the teenage years, our study should encourage parents and guardians (监护人) to limit adolescent smart phone usage at night. Keep in mind that teens aren’t the only ones addicted to their phones! Adults can also benefit from setting a tech curfew(宵禁) for themselves. After all, kids learn by example!
1.What is the text mainly about?
A. How to promote sleep.
B. How kids learn from their parents.
C. The advantages of going to bed early.
D. The disadvantages of phone usage before bed.
2.Who are likely to go to sleep later according to the text?
A. Kids having text conversations before bed.
B. Kids putting their phones away at night.
C. Kids studying their lessons hard at school.
D. Kids exercising with friends after school.
3.Melatonin can ________.
A. make sleep difficult B. lead to later bedtimes
C. help people fall asleep D. wake people from a sleep
4.The author advises parents to ________.
A. learn from their kids
B. get rid of smart phones
C. set a good example to their kids
D. try to benefit from hi-tech development
Humans have long been interested greatly in the idea of being able to walk on water. Sadly, biological facts prevent us ever realizing this dream without artificial aid—we simply weigh too much, and all our weight pushes down through our relatively small feet, resulting in a lot of pressure that makes us sink.
However, several types of animals can walk on water. One of the most interesting is the common basilisk Basilicus basilicus, a lizard (蜥蜴) native to Central and South America. It can run across water for a distance of several meters, avoiding getting wet by rapidly hitting the water's surface with its feet. The lizard will reach a speed of 20 steps per second to keep moving forward. For humans, we would need huge feet that we could bring up to our ears in order to create enough “hitting”.
But fortunately there is an alternative: cornflour(玉米淀粉). By adding enough of this common thickening agent to water (and it does take a lot), you can create a special mixture that doesn't behave like normal water. Now, if the surface of the water is hit hard enough, particles(微粒) in the water get together for a moment to make the surface hard. Move quickly enough and put enough force into each step, and you really can walk across the surface of this adequately thick liquid of cornflour.
Fun though all this may sound, it's still rather messy and better read about in theory than carried out in practice. If you must do it, then keep the water wings(救生圈) ready in case you start to sink—and take a bath afterward!
1.Walking on water hasn't become a reality mainly because humans _________.
A. are not interested in it
B. are afraid to make an attempt
C. have not invented proper tools
D. have biological limitations
2.What do we know about Basilicus basilicus from the passage?
A. It is light enough to walk on water.
B. It can run across water at a certain speed.
C. Its huge feet make it able to stay above water.
D. Its unique skin keeps it from getting wet in water.
3.What is the function of the cornflour according to the passage?
A. To help the liquid behave normally.
B. To turn the water into solid.
C. To create a thick liquid.
D. To make the water move rapidly.
4.What is the author’s attitude toward the idea of humans’ walking on water?
A. It is risky but beneficial.
B. It is impractical though possible in thoery.
C. It is crazy and cannot become a reality.
D. It is interesting and worth trying.
The USA
Well, imagine how my sister felt when she went off for the first time to New York for a business trip. After a few days she was still amazed at how friendly everyone was to her until she took a taxi back to her hotel one night. First she gave just the name of the hotel, but when asked she said the address too. Then she was asked how to get there, but of course she didn’t know. Imagine how frightened she was when the driver started shouting at her for not knowing the way.
The UK
A friend was in London for a conference. He took a taxi and there were no problems: the driver knew the way and was very cheerful. The problem started when he realized he had stupidly left his laptop on the back seat! He called the company up and, in a panic, went straightaway to their Lost and Found office. He was over the moon to find the laptop waiting for him, and then very surprised that it was one of 2,900 left in taxis over the past six months!
Tunisia
Well, my brother took a Mediterranean cruise(巡游) one summer and had a day in Tunis. He spent most of the afternoon in the Medina buying presents when he suddenly realized he’d completely lost track of time and there was only half an hour before the ship left the port. There had been loads of yellow taxis in the centre so he wasn’t too bothered until he stood on the pavement and waited for one to appear——and of course there wasn’t a single one in sight! Nothing! He questioned a passer-by who explained that the cost for the taxi ride goes up in the evening so the taxi drivers disappear until they can charge higher prices! Luckily for my brother the man then offered to give him a lift and he caught the boat on time!
1.What was the author’s sister’s trip by taxi in the US like?
A. Unpleasing and scary. B. Tiring but impressive.
C. Relaxing and exciting. D. Interesting but strange
2.The underlined part “over the moon” in Paragraph 2 can best be replaced by “________”.
A. very happy B. extremely sad
C. quite surprised D. pretty annoyed
3.Why couldn’t the author’s brother find a taxi in Tunis?
A. Because it was too late.
B. Because the weather was bad.
C. Because he didn’t know how to call a taxi.
D. Because the taxi drivers disappeared on purpose.
4.What do the three stories have in common?
A. They are all about taking a taxi.
B. They are all about business trips.
C. They are all about great services.
D. They are all about the author’s family.
Cambridge University Botanic Garden
We run a lively programme of family events, life-long learning courses and much more throughout the year.
Improve your Digital Photography
This course led by award-winning photographer, Pete Murray, will show you how to take control of your camera. Using a proven “step by step approach” you will gain confidence in using your camera.
Date:29/09
Time:10 am—4 pm
Price:￡60
Event Category: Garden Photography
‘Handbag’ Baskets
New to the Botanic Garden, this course will give you the opportunity to make your very own beautiful ‘handbag basket’from a design that local basketry maker, Debbie Hall, developed herself. They have proved very popular since she started teaching the technique.
Date: 07/10
Time: 10 am —4:30 pm
Price: ￡120
Event Category: Weaving & Basketry
Trees and Shrubs(灌木) for Autumn Color
Join Mark Crouch, a specialist in the care of trees, for this course on choosing trees and shrubs to create beautiful autumn displays for your garden. The day will include a talk in our classroom and a tour of the Botanic Garden to look at autumn color and interest across our tree and shrub collection.
Date: 17/10
Time: 10 am —4 pm
Price: ￡50
Event Category: Gardens and Plants
Introduction to Botanical Subjects in Colored Pencil
If you are interested in beginning to use colored pencils to draw botanical subjects, then this is the course for you. Janie Pirie is one of the country’s leading pencil artists and on this one-day course she will show you the basic techniques used when working with colored pencils.
Date: 16/10
Time: 10 am —4 pm
Price: ￡40
Event Category: Botanical Art
1.How much would you pay if you wanted to learn to take better pictures?
A. ￡40. B. ￡50. C. ￡60. D. ￡120.
2.Who is good at making baskets?
A. Janie Pirie. B. Debbie Hall.
C. Pete Murray. D. Mark Crouch.
3.The course that provides an opportunity to tour the garden is held on __________.
A. September 29th B. October 7th
C. October 16th D. October 17th
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