We've used the wind as an energy source for a long time. The Babylonians and Chinese were using wind power to pump water for irrigating crops 4,000 years ago, and sailing boats were around long before that. Wind power was used in the Middle Ages, in Europe, to grind(磨碎) corn, which is where the term "windmill" comes from.

We can use the energy in the wind by building a tall tower, with a large propellor on the top. The wind blows the propellor round, which turns a generator to produce electricity. We tend to build many of these towers together, to make a "wind farm" and produce more electricity. The more towers, the more wind, and the larger the propellors, the more electricity we can make. It's only worth building wind farms in places that have strong, steady winds, although boats and caravans（大篷车）increasingly have small wind generators to help keep their batteries charged.

The best places for wind farms are in coastal areas, at the tops of rounded hills, open plains and gaps in mountains—places where the wind is strong and reliable. Some are offshore. To be worthwhile, you need an average wind speed of around 25 km/h. Most wind farms in the UK are in Cornwall or Wales. Isolated places such as farms may have their own wind generators. In California, several “wind farms” supply electricity to homes around Los Angeles.

The propellors are large, to obtain energy from the largest possible volume of air. The blades can be angled to cope with varying wind speeds. Some designs use vertical turbines(垂直涡轮机), which don't need to be turned to face the wind. The towers are tall, to get the propellors as high as possible, up to where the wind is stronger. This means that the land beneath can still be used for farming. 

The first paragraph aims to introduce to us _______.

A. the function of wind power               B. the source of wind power

C. the nations using wind power             D. the history of using wind power

How does a wind power work?

A. The generator turns the propellor blades and produce electricity.

B. The tall tower helps turn the energy in the air into electricity.

C. Warm air rises and makes the propellor move round.

D. The propellor blown round by wind turns the generator to produce electricity.

The best places for building the wind farm are places where _______.

A. boats and caravans can often be seen         B. isolated farms don’t have enough electricity

C. there are less human activities          D. the wind is strong and reliable

We can infer from the passage that _______.

A. wind farms will not take up too much farming land

B. wind farms need no fuel because wind is free

C. the blades can be angled to turn to face the wind wherever it comes from

D. the higher and larger the towers are, the stronger the wind is

What can be a suitable title for the passage?

  A. Where to build a wind farm.            B. ABC of the using of wind energy.

  C. How to make best use of wind.          D. Wind energy is the best energy.

The black horse is___________ of the pair.

单词拼写。根据下列汉语或首字母提示(有的既给出了首字母，又给出了汉语)，用正确的英语单词形式填空。（共10小题;每小题0.5分,满分5分）

1.In Charles Dicken's times, the rich only o_________ themselves with making money, and 

  had no eye for the needs and welfare of their workers.

2. I love Chengdu No.7 High School, with its _____________ (学术的)atmosphere.

3.The price of instant noodles keeps rising, but some of them are below s____________.

4. Since we have a______（充足的）supplies of food, we are not afraid of any natural disaster.

5. A shopkeeper was sentenced to eight years in prison due to selling fake milk powder and being. lack of social ___________(良心).

6. As a student, you need to devote your time to the a__________ of knowledge.

7.He was happy that his proposal had been a__________ by the committee.

8. Some people object to __________(试验) on animals before a new drug is used to people.

9.The stronger the _______(动机) is, the more quickly a person will learn a foreign language.

10.What's the a______________ way of saying“巴适”in English?

Girls can easily get sad. If your friend is feeling blue and calls you, what will you do? Here are some tips on how you can make her smile again.
Listen to her. When people feel sad, they often have the feeling of needing to be heard. So, listen carefully to what she is saying and do nothing else. Your friend will surely thank you for being the shoulder she can cry on.
Once you are done with listening, you can offer some advice or remain silent and let her feel everything and let it all out by crying. As a friend, you might think you should give her some advice. But if you have no idea about what to say, just remain silent and be there for her.
In order to be able to help your friend in need, don’t be sad for yourself. How can you help your friend when you are also feeling down?
A hug can make a difference in the word. It makes you feel warm and special. A hug makes you feel safe. So give your friend a hug when she needs it the most.
Spend more time with your friend who wants to be happy. Do things together like washing dishes, cleaning, or going out for fun. The more time you spend together, the stronger your friendship will become.
Sometimes, it is much better that you avoid a crying friend in your life. But by doing so, you are also keeping your friend at a distance and will make her wonder if you are her true friend. If you are there when she needs you, your friendship will be much stronger.
【小题1】The writer wrote this passage mainly to tell us_______.

Earthquakes are something that people fear．There are some places that have few or no earthquakes．Most places in the world，however，have them regularly（有规律的）．Countries that have a lot of earthquakes are usually quite mountainous（多山的）．
The most talked about earthquake in the United States was in San Francisco in 1906．Over 700 people died in it．The strongest one in North America was in 1964．It happened in Alaska．
Strong earthquakes are not always the ones that kill the most people．In 1755，one of the strongest earthquakes ever recorded was felt in Portugal．Around 2,000 people died．
In 1923，a very strong earthquake hit the Tokyo，Yokohama area of Japan．A hundred and forty thousand people died．Most of them died in fires which followed the earthquake．
One of the worst earthquakes ever was in China in 2008．It killed a large number of people．The worst earthquake ever reported was also in China，in which 400,000 people were killed or injured．This earthquake happened in 1556．
Earthquakes worry people a lot．The reason is that we often do not know when they are coming．People can not prepare for it．
【小题1】When and where was the worst earthquake ever reported？