After years of research and tests, the hybrid car was developed and put on the market. It's an interesting and exciting new improvement in today's world as we look for better ways to protect the quality of the air we breathe and protect our natural resources.

The quality of our air is affected by many different things. But one of the largest sources of air pollution is the burning of fossil fuel such as coal and gasoline which is used to power a car's engine. The Environmental Protection Agency（EPA）has set national standards to help control the level of harmful pollutants sent off into the air, and the automobile industry has acted by producing the hybrid car that uses less gas and therefore causes less pollution.

A hybrid car is a combination of a regular car that runs on gasoline and an electric car that is battery-powered. Some people tend to think that since the hybrid car is partially electric, you have to plug it in to charge it. But that's not how it works. The 144 volt battery pack（电池组）is actually recharged through the energy that is produced when the car's brakes are used. This is referred to as "regenerative braking", because it generates electricity.

Although the hybrid car still runs on gasoline most of the time, this helps it use less gas than a regular car. When the driver stops at a traffic light, the engine automatically shuts off to save fuel. Then, as soon as the driver puts the car in gear and touches the gas pedal（踏板）, the engine starts backing up.

Have you ever ridden in a car with someone which ran out of gas？That probably wouldn't happen if you were riding in a hybrid car. It flashes a warning on its computer screen that says, "I am low on gas. "When it completely runs out, the warning reads, "YOU ARENOW OUT OF GAS！"Then the electric power supply starts to work to let the driver travel a few more miles to a gas station.

【小题1】Which of the following is true according to the passage？

A．The hybrid car will be put on the market.

B．Hybrid cars run faster than regular cars.

C．When the hybrid car stops at a traffic light, the driver will get a warning.

D．The burning of fossil fuel is one of the largest sources of air pollution.

【小题2】According to the passage, the word "hybrid" refers to_________.

A．a high-tech discovery	B．energy saving
C．a new invention	D．a combination of two things

【小题3】"Regenerative braking" is an important process of the hybrid car because _________.

A．it allows the car to come to a quick stop

B．it gives the driver a smoother ride

C．it produces energy to charge the battery

D．it can control the speed of the car

【小题4】Which of the following is the reason for developing hybrid cars?

A．They use less gas than regular cars.

B．They' re safer to drive than most cars.

C．They' re more modern than other cars.

D．They cost less than regular cars.

   Scientists are debating how to limit their newly-discovered power to change genetic structure. Scientists have already changed the genes of farm animals and agricultural plants to make them more productive or stronger. But now they can also change genes in wild animals and plants. These genes would continue into later generations. For example，it may be possible for scientists' to remove from existence the kind of mosquitoes that carry the Zika virus. They might also be able to permanently remove species of plants and animals that are destructive to other species.

In a report published last week，the U.S. National Academies of Sciences，Engineering and Medicine said it supports continuing research on this kind of gene control. But it warned that it is not possible to know what will happen when these changed plants and animals are released into the wild.

Sixteen biologists，ethicists（伦理学家）and policymakers are on a National Academy of Sciences（NAS）committee that is examining the issue. They say that there is value to the new technology. But，they say，there is not enough evidence to support the release of changed organisms（生物）from the laboratory into nature.

Many people would support stopping mosquitoes and rats from carrying diseases. But scientists say we must understand the possible scientific，ethical，legal and social results of such action before we decide whether to take it. Gene modification is spread through reproduction（繁殖）.Changed genes will continue to spread as long as an animal or plant continues to reproduce. They cannot be limited to a farm or kept within a country's borders. Scientists are wondering what may happen if a changed organism mates with another species. They are not yet sure how the changed genes would affect the other species. It is possible that those genes could harm those creatures or even lead to their disappearance from our planet.

【小题1】What possible advantage does gene control in wild animals and plants have?

A．Changing the Zika virus permanently.

B．Removing the destructive species forever.

C．Having changed genes in their next generations.

D．Making all the species more productive and stronger.

【小题2】Which of the following is NOT true according to the passage?

A．Scientists are not sure what exact results gene modification leads to.

B．Scientists won't change any genes before they make the final decision.

C．Gene modification has benefited some farm animals and agricultural plants.

D．Scientists have not applied gene modification to wild animals and plants in case of possible danger.

【小题3】As for genetically changed wild animals and plants, what are scientists worried about?

A．They may become weaker or die out.

B．They may be more productive.

C．They may cause damage to their living habitat.

D．Their genes may spread to later generations.

【小题4】What can be the best title for the passage?

A．Stop research on gene control

B．How to change genetic structure

C．Power and danger of gene control

D．Advantages of gene control in wild animals and plants

   A new keyboard can tell whether you are its owner. The keyboard records information about the typing pattern（模式）and sends it to a computer program. The program then checks to see if the pattern matches the right user. If not, an alarm sounds, and the computer locks the typist out. It locks out everyone else, even if the person knows the password. What's more, this equipment needs no batteries. It collects all the energy it needs from your actions of typing. Besides, the keyboard is also self-cleaning and the keys are free of damage from water, oil and dirt.

The keys of the new keyboard are made of the same inexpensive plastic that might be found on any other standard keyboard. But instead of being smooth, the keys have millions of tiny plastic nanowires（纳米线）on their surface area, increasing the effective contact areas between the plastics and fingers. This guarantees that there's enough power to run the keyboard as someone types.

Liming Dai, a scientist, did not work on the new keyboard, but he thinks the design could be important in getting better performance from a variety of equipment. "It could also be applied to a touch screen, for example, "Dai says. " Then smart phones and notepads could collect energy from someone's actions of typing or drawing. "

"Future work might make the keyboard even more useful, "Dai adds. " A later design might build tiny capacitors onto the nanowires, "he suggests. Capacitors are little devices that temporarily store electric charge. Those might then be LEDs to light a keyboard in the dark.

Zhonglin Wang is a co-designer of the new keyboard. His team has built a working model of the keyboard. "If a company decides to fund（资助）its production, this keyboard could be in stores in as few as two years, "says Wang.

【小题1】How does the new keyboard tell whether you are its owner？

A．By matching the typing pattern to the right user.

B．By sending alarms to a computer program.

C．By checking the right user's passwords.

D．By just recording information about the typing pattern.

【小题2】Why are there many nanowires on the surfaces of the keys？

A．To keep the keyboard free of damage.

B．To improve the speed of typing.

C．To make the keys smooth.

D．To help produce power.

【小题3】What's Dai's attitude to the new keyboard？

A．Unconcerned.	B．Doubtful.
C．Positive.	D．Critical.

【小题4】What is the best title for the text？

A．A New Keyboard Made of Nanowires

B．A New Keyboard Entirely Owned by You

C．A New Keyboard's Future

D．A New Keyboard Powered by Typing

   Would you buy a car that can release calming smells into the air when you are stuck in heavy traffic? Would you buy a robot that smells like a human being?

Many people have seen the 3-D computer-made environments of virtual reality（虚拟现实）. Now these virtual worlds will not just look and sound real. Researchers have created VR environments that even smell like the real ones. With the new technology, users open a virtual door and step into a new environment, like a rainforest. After they enter this virtual world, special equipment releases forest-like smells into the air to make the experience feel more real.

Suzanne Fisher-Murray said, “It is a really wonderful experience that you have because you’re exploring this environment and you have smells with it.”

In the United States, Smell-O-Vision was designed to provide smells during the showing of a movie. The Smell-O-Vision system was once popular in the 1960s. Now, Emanuela Maggioni says it is close to becoming popular again. “It connects emotions and memories with the sense of smell,” Maggioni said. “It is unbelievable what we can do with the technology.”

The uses of smell technology are not just limited to films and the performing arts. Researchers showed a computer program where users could imagine themselves driving a car. The system included a special smell-spraying machine. Dmitrijs Dmitrenko said, “We want to deliver the smell of lavender(薰衣草) every time the person drives over the speed limit. We choose lavender because it’s a very calming smell.”

Scientists are experimenting with smells instead of sounds or image-based alerts on telecommunications equipment. And businessmen have already used smells to influence people’s behavior. “Not only in stores, but also in other places you can create and stimulate(刺激) immediate purchase,” Maggioni said. “So you’re in a library and when you smell coffee you will unconsciously have the need to drink a coffee.”

【小题1】Using smell technology, researchers make VR environments ________.

A．have a smell of a rainforest

B．even smell like the real ones

C．look like a 4-Denvironment

D．frighten people with a virtual world

【小题2】The example of Smell-O-Vision proves that________.

A．America is the first to use smell technology

B．cinemas are the most suitable places for the sense of smell

C．smell technology has been used before

D．it is out of date to use smell-spraying devices

【小题3】How is smell technology used by businessmen？

A．To make buyers understand salesmen better.

B．To remind people of their unrealistic purchase.

C．To help customers choose their favorite goods.

D．To stimulate people to buy things.

【小题4】What is the main idea of the passage？

A．The new developments of smell technology.

B．A major breakthrough of VR technology.

C．The sense of smell in human communication.

D．The advanced smell-spraying machines.

The Square
Jack Dorsey, the co-inventor of Twitter, is promoting his latest invention called the Square. The square is a small plug-in attachment to your mobile phone that allows you to receive credit card payments.
The idea starting from Dorsey's friend Jim McKelvey who was unable to sell some glass work to a customer because he couldn't accept a particular card being used.
Accepting credit card payments for something you're selling isn't always easy, especially if you are mobile like a tradesman, or delivery service at a trade show.
This latest invention uses a small scanner that plugs into the audio input item on a mobile device. It reads information on a credit card when it is swiped(刷卡). The information is not stored on the device but sent over secure channels to banks. It basically makes any mobile phone a cash register for accepting card payments.
As a payer, you receive a receipt via email that can be instantly accessed securely online. You can also use a text message to authorize payment in real time. Retailers can create a payer account for their customers which speeds the payment process. For example, a cardholder can assign a photo to their card so their photo will appear on the phone for visual identity confirmation. Mobile devices with touch screens will also allow you to sign for goods.
There are no contracts, monthly fees, or hidden costs to accept card payments using Square and it is expected the plug-in attachment will also be free of charge.
As with Twitter, it's expected that Dorsey will direct the company based upon feedback from users. Square Inc. has offices in San Francisco, Saint Louis and New York and is currently beta testing the invention with retailers in the United States.
【小题1】Why is Jack Dorsey promoting his latest invention?

A．To test a plug-in attachment.

B．To identify a particular credit card.

C．To sell some glass work to a customer.

D．To allow people to receive credit card payments.

【小题2】What can we infer from Paragraph 4?

A．The service performs only on special mobile phones.

B．The latest invention is just a small scanner.

C．The Square contains information on a credit card.

D．It is safe for your information to be sent to banks.

【小题3】How can a cardholder receive a receipt?

A．By email online.

B．By oral message.

C．By a payer account.

D．Over safe channels to banks.

【小题4】What does the writer imply in the last paragraph?

A．The invention may be used in the future.

B．The Square has already put into use widely.

C．The invention hasn’t been tested these days.

D．The Square is popular among people in the US.