根据短文内容,从短文后的七个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。

The right pair of exercise shoes can do a lot to prevent discomfort and injuries, personal trainers say.Here are some shopping tips:

1. Depending on your workout, shoes designed for walking, running, tennis, cross-training or another specialty will provide the best support for your feet.

Shop when you normally exercise.Feet actually get bigger throughout the day, sometimes swelling up as much as a half-size by nighttime. 2.

Try them on.Never grab a pair of exercise shoes based only on the size of footwear you normally buy.Bring the type of socks you’d wear to work out and go for a walk through the store.

3. You should be able to spread your toes out comfortably.Make sure there’s about a half-inch of space between them and the front of the shoe.The back should fit snugly (warmly and comfortably) against your heel and not move up and down.If your feet are different sizes, buy based on the larger one.

Talk to an expert.Shoe salesmen and personal trainers can study your stride (步伐) and the shape of your feet. 4.

5. Many trainers recommend switching footwear every three to five months, if possible, to maintain(保持)proper cushioning and support.One tip: if you have to tie your shoes very tightly to feel a good amount of support, they may be ready to go.

A.Think about how much you can afford to buy the workout shoes.

B.Consider your type of exercise.

C.Focus on fit.

D.So don’t shop first thing in the morning if you often work out in the evening.

E.Pay more attention to new style shoes

F.Replace worn shoes regularly.

G.Usually they can recommend the best shoes to guard against injuries.

Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your sport of choice might have great influence on the environment.

Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemicals and huge amounts of energy are used to keep its courses(球场)in good condition. This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas.

There are many environment-friendly sport. Power walking is one of them that you could take up today. You don’t need any special equipment except a good pair of shoes; and you don’t have to worry about resources and your purse. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.

Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be “green gyms”. They are better replacements for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, it’s free.

1.Which of the following is the author most probably in favor of?

A. Cycling around a lake.

B. Motor racing in the desert.

C. Playing basketball in a gym.

D. Swimming in a sports center.

2.What do we know about golf from the passage?

A. It is popular in Portugal and Spain.

B. It causes water shortages around the world.

C. It pollutes the earth with chemicals and wastes.

D. It needs water and electricity to keep its courses green.

3.The author uses power walking as an example mainly because______.

A. it is an outdoor sport

B. it improves our health

C. it uses fewer resources

D. it is recommended by experts

4.The author writes the passage to_______.

A. show us the function of major sports

B. encourage us to go in for green sports

C. discuss the major influence of popular sports

D. introduce different types of environment-friendly sports

请认真阅读下列短文,从短文后各题所给的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。

Wind turbines are efficient sources of cheap energy but also a source of concern as their huge spinning blades (叶片) frequently kill birds and bats. A new type of wind generator developed in Spain offers a creative solution to that problem.

In 2002, Spanish inventor David Yanez saw a short film about the Tacoma Narrows Bridge in the U.S., collapsing in strong wind. It was a vivid example of the powerful vibrations wind can create when it blows past a long pole, such as a car antenna or even a stick of bamboo. It gave him the idea for a new type of wind-energy generator.

“The initial philosophy or spirit was to create a generator of dreams that had all the qualities one would want: It should be as cheap as possible, need as little maintenance as possible, the setup as simple as possible,” he said.

Yanez and his friend Raoul Martin took the idea to an engineering firm, where they were told it would never work. Undiscouraged, they started experimenting on their own in a small wind tunnel they built.

Good initial results were repeated by a larger working model called Vortex (涡旋) installed in a nearby field. “What we have is a mast (桅杆), which is the top piece and acts as a blade,” Yanez said. “It’s constructed from the same material as a conventional generator, and what it does is it oscillates (振荡), transmitting the oscillation to a conventional alternator, which by its own oscillation converts the wind’s energy into electric energy.”

Yanez said the output of the 6-meter-tall generator, and even that of smaller models, was better than expected. The Vortex creates about 30 percent less energy than a comparable bladed wind turbine, but it is lighter and cheaper to build and maintain. It is made mostly of reinforced plastic and has very few moving parts. Also, it does not create noise and—even more important for many environmentalists—it does not present a threat to passing birds.

The current prototype works at wind speeds ranging from 1.5 to 7 meters per second. The inventors say the next step is building a 12.5-meter tall bladeless generator with a 4-kilowatt capacity that could power small businesses or individual homes, or provide supplemental power to a main grid. The commercial version of the Vortex Bladeless generator should be ready for the market by 2017.

1.The author mentions a short film about the Tacoma Narrows Bridge to show ________.

A. what the initial philosophy or spirit was

B. what inspired Yanez to create the generator

C. how the bridge was destroyed in strong wind

D. how wind creates powerful vibrations

2.What do we know from the passage?

A. The original idea was considered as practical in an engineering firm.

B. Yanez and Martin’s initial tests by themselves proved to be successful.

C. The material for constructing the mast is different from that of the past.

D. The new generator is better at creating energy than a comparable bladed one.

3. What would be the best title for the passage?

A. Bladeless wind-power generator is friendly to birds.

B. Wind turbines are efficient sources of cheap energy.

C. A new generator will come onto the market by 2017.

D. Yanez has made a generator for the benefit of people.

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