题目内容

We can find different vitamins in different foods. Then which food should we eat to keep us healthy? Let’s look at some important vitamins for the answer.

Vitamin A helps to protect skin(皮肤) from becoming dry. It is also helpful to the eyes. Without vitamin A, you cannot see well in darkness. Vitamin A is found in animal liver(肝脏) and the yellow part of eggs. Sweet potatoes, carrots and other dark-coloured fruit and vegetables have something that body can change into vitamin A.

Vitamin B changes food into energy and helps the heart and nerve system(神经系统) to work well. Without it, we will be weak and will not grow. Scientists find it in corns and other foods like beans, nuts, meat and fish.

Vitamin B helps to make red blood cells(红血球). You can find in food like eggs, meat, fish, milk and green vegetables.

Vitamin C is good for strong bone and teeth, and for healthy blood vessels(血管). It also helps wounds(伤口) to get better quickly. The body stores little vitamin C, so we must get it everyday in foods like oranges, tomatoes and cabbage.

Vitamin D increases the level of calcium(钙) in the blood. Calcium is needed for nerve and muscle cells to work well, as well to build strong bones. Fish liver oil has vitamin D. In some countries, milk producers put vitamin into milk so that it will be good for children.

1.Without ________, we cannot see well in darkness.

A. vitamin A B. vitamin B C. Vitamin C D. Vitamin D

2.According to the passage, vitamin B can be found in _______.

A. fish liver oil B. corns, meat and fish C. milk and vegetables D. animal liver and eggs

3.From the passage, we know that vitamin C is good for _________.

A. the skin B. the heart C. blood vessels D. nerve and muscle

4.Some milk producers put vitamin D into milk mainly to help children to ________.

A. have good eyesight B. produce blood cells

C. get enough calcium D. heal wounds quickly

5.According to the passage above, which of the following is TRUE?

A. We can get vitamins form everything. B. We can live healthily with few vitamins.

C. Vitamins are not important to our health. D. Different vitamins help us in different ways.

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A bicycle may be seen by most people as just another vehicle (交通工具),but for many people in London, cycling is a way of life. According to an official UK government survey in 2017, about 570,000 bike journeys are made every day in London. In fact, almost half of the vehicles that pass over London Bridge each day are bikes.

London introduced a public bike-sharing system in 2010. "There can be no doubt that our trusty bicycles have changed the way people get around our great city," Johnson told the Guardian in 2015.

In London, bike are used for more than just taking short trips to and from the subway. No matter where you want to go in the city, taking a bike is usually the quickest and easiest choice.

And it's not just shared bikes that the government is encouraging people to ride. In many companies across the UK, the UK government's Cycle to Work scheme (倡议)allows employees to buy a brand new bike without having to pay any tax(税). This means that it's common to see many people cycling to and from work, and some employee even provide workplace showers and lockers (储物柜) for their workers. More importantly, a cycle-friendly boss may let you off for being late if you rode a bike to work.

Not only is it great for the environment and our body, cycling is also good for the mind. According to National Geographic Magazine, "Bike riding can improve people's happiness."

1.What's Johnson's attitude(态度) toward the bike-sharing system in London?

A. Supportive B. Doubtful C. Disappointed D. Uninterested

2.What can employee get from the government under the "cycle to work" scheme?

A. Free bike-sharing services B. A tax-free bike

C. Shorter working hours D. Workplace showers and lockers

3.What's the article mainly about?

A. Cycling as a healthy way of life. B. London's public bike-sharing system.

C. What Londoners are encouraged to ride bikes. D. How cycling has become popular in London.

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