The bed should be reserved as a place for sleep, but people tend to read an iPad a lot in bed before they go to sleep.

Charles Czeisler, a professor at Harvard Medical School, and his colleagues got a small group of people for an experiment. For five days in a row, the people read either a paper book or an iPad for four hours before sleep. Their sleep patterns were monitored all night. Before and after each trial period, the people took hourly blood tests to paint a day-long picture of just how much melatonin (褪黑激素) was in their blood at any given time.

When subjects read on the iPad as compared to the paper books, they reported feeling less sleepy at night and less active the following morning. People also took longer to fall asleep on the iPad nights, and the blood tests showed that their melatonin secretion (分泌) was delayed by an hour and a half.

The researchers conclude in today's journal article that given the rise of e-readers and the increasingly widespread use of e-things among children and adolescents, more research into the long-term consequences of these devices on health and safety is urgently needed. Czeisler and colleagues go on, in the research paper, to note:“Reading an iPad in bed may increase cancer risk.”

However, software has been developed that can reduce some of the blue light from the screens of phones and computers according to time of day, and there are also glasses that are made to filter (过滤) short wavelengths. While they seem like a logical solution for the nighttime tech users, it needs more research.

1.In Charles Czeislers experiment, all the subjects were asked to______.

A. sit in a row and receive the strict tests

B. have their sleep patterns observed all night

C. read a paper book and an iPad at the same time

D. have their blood tested per hour during the trial

2.The third paragraph tells us the iPad readers were likely to____________.

A. feel less sleepy and tired in the day

B. fall asleep more easily after reading

C. become less energetic the next morning

D. have a lot more melatonin secretion

3.The special software recently developed can______.

A. remove the blue light from your devices completely

B. help prevent eyes being harmed by short wavelength

C. weaken the harm done by doing nighttime e-reading

D. be used in all the e-things widely and safely

4.Which of the following can be the best title for the text?

A. No e-reading in bed before sleep

B. New software for night e-readers

C. Wrong behaviors before bedtime

D. No games on iPad in bed

See a cellphone cover that you like on Taobao? Forget about placing an order, paying the bill online and waiting for days for it to be delivered to you. In the near future, you'll be able to get it in minutes just by hitting “print” on your computer.
You might find it hard to believe that you could actually “print” an object like you would a picture. But it is not that hard to understand how it would work. Just as a traditional printer sprays ink onto paper line by line, modern 3D printers spread material onto a surface layer by layer, from the bottom to the top, gradually building up a shape.
Instead of ink, the materials the 3D printer uses are mainly plastic, resin(树脂) and certain metals. The thinner each layer is—from a millimetre to less than the width of a hair—the smoother and finer the object will be.
This may sound like a completely new technology, but the truth is that 3D printing has been around since the late 1980s. Back then, it was barely affordable for most people, so few knew about it.
Last year, though, saw a big change in the 3D printing industry—printers became much cheaper. For example, 10 years ago a desktop 3D printer might have cost £20,000, while now they cost only about £1,000, according to the BBC.
Taken out of the factory and introduced to more diverse and common uses, 3D printing can create just about anything you can think of—flutes , bikinis, jewelry, aircraft parts and even human organs. In fact, scientists from Cornell University in New York have just made an artificial ear using a 3D printer, according to Science Daily. The fake ear looks and acts exactly like a natural one.
However, as 3D printing becomes more common, it may bring about certain problems—such as piracy. “Once you can download a coffee maker, or print out a new set of kitchen utensils (餐具) on your personal 3D printer, who will visit a retail store again?” an expert in 3D printing told Forbes News. Even more frightening, what if anyone in the world could use a 3D printer to print out a fully functioning gun?

1.According to the article, in the future, the 3D printing technology will _______.
A. enable people to make better purchases online

B. change the way we make many products
C. be applied as widely in our daily life as computers
D. shorten the time it takes for people to get what they buy online

2.What happened in the 3D printing industry last year?
A. The 3D printing technology was taken out of the factory.
B. The 3D printing technology began to be used in various fields.
C. The 3D printer was used for medical treatment for the first time.
D. The 3D printer became more affordable for consumers.

3.What is the best title of the passage?
A. Great Demand for 3D Printers B. Technology in the Future
C. Online Shopping Disappearing D. Printing out Everything

4.How is the last paragraph developed?
A. By giving examples.

B. By making comparisons.
C. By analyzing the cause and effect.

D. By presenting research findings.

阅读下面短文,掌握其大意,从每题所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。

Life becomes easier when you learn to accept an apology you never got. I’ve always tried to keep my ________ from people who are rude, aggressive and mean. But sometimes we ________ become tied to people who might not have our best ________ at heart.

Last summer, I became involved with a(n) ________ coworker who was at a bad spot in his life. I had a lot of________ for him and decided to help him ________ this tough time, so I tried my best to ________ his rudeness when he lost his temper. However, just like a swimmer drowning in a pool, he grabbed on and ended up drowning me when I reached out and tried to ________ him. His rudeness gradually was out of ________ . One night, when I got up to get a glass of water, he started yelling at me to get back into my bedroom. I did as I was told but I was not happy about it. He ________ my shift in mood and asked what was wrong. But when I told him his behavior toward me was ________ and that I was very hurt by the way he had treated me, he was ________ . He could not understand his actions had ________ impacted me. He told me he didn’t have anything against me that there was no need for me to ________it. I used examples from his life of things that had hurt him and then tried to make the ________ that the same things also made me ________ . I said, “ I always treat you with compassion, patience and understanding, but you haven’t treated me with ________ respect.” He was silent after listening to my words. What I had said might ________ him.

People only change if they want to change. I didn’t know whether he would shift his ________or not in the future, but I would continue to________ him through my patience, understanding and kindness.

1.A. difference B. distance C. pressure D. absence

2.A. luckily B. expectantly C. unwillingly D. unavoidably

3.A. decisions B. performances C. interests D.consequences

4.A. co-operative B. kind-hearted C. easy-going D. bad-tempered

5.A. advice B. sympathy C. permission D. selection

6.A. get across B. get out of C. get through D. get off

7.A.control B.tolerate C. criticize D. explain

8.A.rescue B. persuade C. entertain D. drag

9.A. practice B. action C. control D. danger

10.A. forgave B. ignored C. understood D. noticed

11.A. unacceptable B. appropriate C. unnecessary D. traditional

12.A. surprised B. scared C. anxious D. shamed

13.A. properly B. directly C. deliberately D. equally

14.A. accept B. doubt C. refuse D. mind

15.A. summary B. analysis C. comparison D. expectation

16.A. upset B. unfriendly C. puzzled D. selfish

17.A. promised B. deserved C. proven D. intended

18.A. annoy B. satisfy C. touch D. inspire

19.A. ambition B. involvement C. requirement D. perspective

20.A. convince B. trust C. praise D. comfort

Christian Eijkman, a Dutch doctor, left the Netherlands for the island of Java. Many people on the island had a disease called beri-beri. He was going there to try and find a cure.

At first, Eijkman thought some kind of germ (细菌) caused beri-beri. He raised some chickens. He didn’t eat them, but made experiments on them. The local people were quite surprised at that. One day he noticed that his chickens became sick when they were fed the food most Javanese ate — refined white rice (精炼米). When he fed them with unrefined rice, also known as brown rice, they recovered. Eijkman realized that he had made an important discovery — that some things in food could prevent disease. These things were named vitamins. The Javanese were not getting enough vitamins because they had actually removed the part that contains vitamins. Later, other diseases were also found to be caused by the lack of vitamins in a person’s food.

Today many people know the importance of vitamins and they make sure they have enough vitamins from the food they eat. If they don’t, they can also take vitamin pills.

1.Christian Eijkman went to the island of Java to ______.

A. help the Javanese with their illness

. find ways to grow better crops

C. do some research about the island

D. spend his holiday

2.Why did Christian Eijkman raise some chickens?

A. To eat them.

B. To make money by selling them.

C. To give the Javanese a surprise.

D. To carry out his experiments.

3.If a person doesn’t get enough vitamins in his diet, he’d better ______.

A. eat more rice B. eat vitamin pills

C. eat some chicken D. eat more meat

Dolphins(海豚) live in a dark underwater world. It’s often impossible to see each other or anything else around them, so sound plays an important role in their survival. To communicate with each other, dolphins produce all kinds of sounds.

Only other dolphins understand what the sounds mean. Scientists haven’t uncovered their secret communication, except for one kind of whistle. It might last less than a second, but this whistle is a big deal. Why? Because these whistles are actually names of dolphins - and every dolphin has one. Scientists call these sounds a “signature whistle.” When other dolphins hear the whistle, they know which dolphin is calling.

Dolphins often hunt by themselves but still need to stay connected to the group. Since they can’t always see each other, dolphins use their signature whistles to check in with other dolphins hundreds of yards away. “In coastal areas, dolphins exchange whistles even when they’re a third of a mile apart,” says Greg Campbell, who studies animals. That means dolphins shout out to group members that might be nearly five football fields away.

What’s amazing is who names the baby dolphin. Not the mother. Not an auntie dolphin or another group member. Scientists believe the baby dolphin itself comes up with the signature whistle. Like human babies, a baby dolphin plays with sounds throughout its first year. While testing its sound skills, a baby dolphin is doing something amazing. It’s creating or figuring out its signature whistle. How or why it chooses its signature whistle is not clear. Studies show that most of the time the signature whistle is nothing like its mother’s or group members’ whistles.

When the baby dolphin is about a year old, its signature whistle is set. It repeats it often so the other dolphins learn to recognize it.

Deciphering(破译) dolphin names is just the beginning of figuring out what dolphins communicate about. Do they chat about sharks? Discuss the tides? Maybe they even have a name for people. Someday scientists are to decipher the rest of dolphins’ communication.

1.Sound is important for dolphins because of ______.

A.their poor sense of direction

B.their living environment

C.their strong enemies

D.their big groups

2.The dolphin’s signature whistle ______.

A.lasts along time

B.can travel long distances

C.is especially helpful in hunting

D.can be recognized by other animals

3.The author writes the text mainly to _____.

A.encourage readers to study dolphins

B.tell readers how dolphins communicate

C.show how lovely and clever dolphins are

D.introduce a special sound made by dolphins

4.A baby dolphin gets its name ______.

A.soon after it was born B.according to its size

C.all by itself D.with the help of its group

完形填空,阅读下面短文,掌握其大意,从每题所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。

While attending a conference, I returned to my hotel room late one evening. The overhead light outside my door was burned out and I had finding the keyhole. When I to open the door, I around the wall for a light switch. I found a plate where a switch was installed... but no switch!

Not discouraged easily, I remembered a lamp by the bed when I laid my luggage in the day. I found the bed in the and then the lamp, but when I switched it on, nothing ! I thought that perhaps if I opened the curtains I might be able to use whatever light comes in from the ___ to find another lamp. So I my way slowly across the room to the curtains and... no drawstring! I finally stumbled(跌跌撞撞地走)around I found a desk lamp which actually !

That evening I discovered in a whole new way just how dark the world _____ be and how necessary light is! But even more necessary than light is the light that shines from people — the light of and faith. Because, for many people, the world is a dark and place. For someone today just may be stumbling in discouragement or sadness or fear and in of some light. So let your light shine. Whatever light you may be a beacon of hope and encouragement. And if you feel that your light is a candle in a forest remember — there isn’t enough darkness in all the world to the light of one small candle.

1.A. confidence B. respect C. admiration D. difficulty

2.A. managed B. failed C. wished D. meant

3.A. touched B. felt C. sensed D. looked

4.A. already B. never C. still D. once

5.A. equipping B. producing C. spotting D. removing

6.A. later B. earlier C. lower D. upper

7.A. light B. dark C. room D. corner

8.A. happened B. operated C. fired D. developed

9.A. machine B. street C. room D. car

10.A. wound B. forced C. made D. lost

11.A. after B. until C. while D. since

12.A. helped B. affected C. worked D. inspired

13.A. can B. shall C. will D. must

14.A. mental B. psychological C. electrical D. physical

15.A. existence B. love C. truth D. wisdom

16.A. lonely B. colourful C. friendly D. complex

17.A. short B. favour C. face D. need

18.A. make B. offer C. take D. contribute

19.A. not more than B. other than C. no more than D. rather than

20.A. put out B. give out C. get over D. set up

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