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1.He persuaded some people go back with him to Greenland.

2.Biarni was hoping to join his father which was with Eric.

3.Some fish can produce sounds twice as louder as your speaking voice.

4.I tried to make my brother understand, but he was terrifying and stayed in the boat.

5.The hikes costs $2,500 included all flights and accommodation.

6.He asked Marco to serve in his court and sent him to do many important task.

7.He was also confused by the black stones people used to burning for fuel.

8.Later, these rocks proved that at one time in the distant past the Antarctic is covered by plants.

9.They were hopeful that this would help to save energy, reduce pollution and provide free public transport to everybody.

10.But a lot of people think that solar cars are either too slow nor unreliable.

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The sharing economy, represented by companies like Airbnb or Uber, is the latest fashion craze. But many supporters have overlooked the reality that this new business model is largely based on escaping regulations and breaking the law.

Airbnb is an Internet-based service that allows people to rent out spare rooms to strangers for short stays. Uber is an Internet taxi service that allows thousands of people to answer ride requests with their own cars. There are hundreds of other such services.

The good thing about the sharing economy is that it promotes the use of underused resources. Millions of people have houses or apartments with empty rooms, and Airbnb allows them to profit from these rooms while allowing guests a place to stay at prices that are often far less than those charged by hotels. Uber offers prices that are competitive with standard taxi prices and their drivers are often much quicker and more trustworthy.

But the downside of the sharing economy has gotten much less attention. Most cities and states both tax and regulate hotels, and the tourists who stay in hotels are usually an important source of tax income. But many of Airbnb’s customers are not paying the taxes required under the law.

Airbnb can also raise issues of safety for its customers and trouble for hosts’ neighbors. Hotels are regularly inspected to ensure that they are not fire traps and that they don’t form other risks for visitors. Airbnb hosts face no such inspections.

Since Airbnb is allowing people to escape taxes and regulations, the company is simply promoting thefts. Others in the economy will lose by bearing an additional tax burden or being forced to live next to an apartment unit with a never-ending series of noisy visitors.

The same story may apply with Uber. Uber is currently in disputes over whether its cars meet the safety and insurance requirements imposed on standard taxis. Also, if Uber and related services flood the market, they could harm all taxi drivers’ ability to earn a minimum wage.

This downside of the sharing needs to be taken seriously, but that doesn’t mean the current tax and regulatory structure is perfect.

1.What is the positive thing about the sharing economy?

A. It is a global trend.

B. It is beyond regulations.

C. It draws on spare resources.

D. It brings in modest profits.

2.What is the problem with Airbnb customers according to the passage?

A. They are not regularly inspected.

B. They are likely to commit thefts.

C. They are allowed not to pay taxes.

D. They can be noisy to hosts’ neighbours.

3.What is the argument over Uber according to the passage?

A. Whether it guarantees customers’ safety.

B. Whether it provides reliable services.

C. Whether it lowers customers’ expenses.

D. Whether it can compete with standard taxis.

4.What will be talked about in the following paragraphs?

A. Existing regulations and laws.

B. Necessary improvements of current laws.

C. Further development of Airbnb and Uber.

D. More downsides of Airbnb and Uber.

There have always been a lot of commonly believed but false ideas about being fat and doing exercise. Some people believe that they can’t help putting on weight as they get older, while others hold that if they stop exercising, their muscles will turn into fat. Here are some more myths:

I’ll never lose weight---I come from a fat family

Wrong! While we can’t change the body type we are born with, we can’t blame our genes for making us fat. There’s plenty of evidence that fatness runs in families, and the main reason is that they share the same habits of eating too much and exercising too little.I am fat because I burn calories slowly

Wrong! Fatness is not caused by a slow metabolism(新陈代谢). In fact, although fat people consume 消耗more energy than slim people, they also fail to realize how much they eat! Keeping a diary can help you work out your daily food intake more accurately.

Exercise is boring

Wrong! Anything will become boring if you do it repetitively. The key is to develop a balanced and varied多样的 program that’s fun as well as progressive. If you enjoy a Sunday walk, take a difference route. If you do yoga, try a tai chi class. If you like swimming, set yourself a distance or time challenge.

No pain, no gain

Wrong! Exercise is not meant to hurt. Indeed, pain is your body telling you something’s wrong, and continuing to exercise could lead to serious injury. You may experience mild discomfort as you begin to exercise regularly, but this is adapting to the positive changes in your lifestyle and the aches should disappear relatively quickly. If you don’t, rest and seek medical advice.

1.What does the author think about being fat?

A. It is the family genes that make people fat.

B. People are fat because they consume too little energy.

C. A diary of exercise can prevent people from becoming fat.

D. It is the result of people’s unbalanced lifestyle.

2.According to the author, how can we make exercise more interesting?

A. By taking varied exercise.

B. By choosing simple exercise.

C. By doing regular exercise.

D. By sticking to(坚持)outdoor exercise.

3.What is the purpose of the passage?

A. To state the importance of keeping fit.

B. To clarify(澄清) some misunderstandings about fatness and exercise.

C. To test what has long been believed about keeping fit.

D. To explain some medical facts about being fat and doing exercise.

Do you drink water that's been left sitting out overnight or even for another day? Have you noticed it tastes different?

Tap water that has been left to sit out slowly begins to acquire(获得) off taste. Many people think that this is because of microorganisms. But that's not what makes old water taste not fresh. For that we can thank carbon dioxide. After about 12 hours, tap water starts to go flat as carbon dioxide in the air starts to mix with the water in the glass, lowering its PH and giving it an off taste. But it's most likely safe to drink.

However, back to those microorganisms. If you use a dirty glass day after day, there is more of a chance of bacteria making themselves known; a risk that increases if you share the glass with another mouth as well. But assuming(假设) you use a fresh glass every few days, you probably won't have a problem unless the glass has been touched by dirty fingers, and especially if those dirty fingers went unwashed after using the bathroom.[

As for plastic water bottles that have been left out in the sun or in the car, step away from the bottle, warns Dr. Kellogg Schwab, director of the Johns Hopkins University Water Institute. "A chemical called biphenyl-A, or BPA, along with other things used to make plastic can leach(过滤) into your water if the bottle heats up or sits in the sun," he explains. BPA, as you probably know, has been linked to everything from heart disease to cancer. Schwab also adds that plastic used for commercial bottled water isn't meant to be washed or refilled, so use only one time and recycle. Or don't buy them at all; use refillable water bottles instead.

1.Tap water begin to acquire an off taste because of______ .

A. carbon dioxide B. BPA

C. the glass D. the microorganism

2.According to Paragraph 2, tap water that's been left sitting out for 12 hours____.

A. contains few microorganisms B. is still safe to drink

C. tastes better D. is most likely undrinkable

3.What should we do with plastic water bottles that have been left out in the sun or in the car?

A. Use them after they cool down.

B. Clean them and use them again.[来

C. Throw them away.

D. Refill them with fresh water

4.Which of the following is true about BPA?

A. It is safe for people to use.

B. It is a kind of new material.

C. It is the main material to make plastic.

D. It can cause great harm to people.

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