With his attention________on the shops along the roadside，he knocked an old man down while riding to school.

A  concentrating     B．concentrated     C．to concentrate      D．concentrates

答案　B

解析　考查词组，故选B项。

（2011·安徽卷）B

Think about the different ways that people use the wind. You can use it to fly a kite or to sail a boat. Wind is one of our cleanest and richest power sources（来源）, as well as one of the oldest. Evidence shows that windmills（风车）began to be used in ancient Iran back in the seventh century BC. They were first introduced to Europe during the 1100s, when armies returned from the Middle East with knowledge of using wind power.

For many centuries, people used windmills to grind（磨碎）wheat into flour or pump water from deep underground. When electricity was discovered in the late 1800s, people living in remote areas began to use them to produce electricity. This allowed them to have electric lights and radio. However, by the 1940s, when electricity was available to people in almost all areas of the United States, windmills were rarely used.

During the 1970s, people started becoming concerned about the pollution that is created when coal and gas are burned to produce electricity. People also realized that the supply of coal and gas would not last forever. Then, wind was rediscovered, though it means higher costs. Today, there is a global movement to supply more and more of our electricity through the use of wind.

60. From the text we know that windmills              .

A. were invented by European armies

B. have a history of more than 2800 years

C. used to supply power to radio in remote areas

D. have rarely been used since electricity was discovered

61. What was a new use for wind power in the late l9th century?

A. Sailing a boat. 

B. Producing electricity.

C. Grinding wheat into flour.

D. Pumping water from underground.

62. One of the reasons wind was rediscovered in the 1970s is that             .

A. wind power is cleaner

B. it is one of the oldest power sources

C. it was cheaper to create energy from wind

D. the supply of coal and gas failed to meet needs

63. What would the author probably discuss in the paragraph that follows?

A. The advantage of wind power.

B. The design of wind power plants.

C. The worldwide movement to save energy.

D. The global trend towards producing power from wind.

【解析】选D。推理判断题。根据末段句子Today, there is a global movement to supply more and more of our electricity through the use of wind可知，接下来作者应该谈论利用风能发电的情况，因此选择D项。

“Since you’ve agreed to go, why aren’t you getting ready？” “But I ______ that you would have me start at once.”

    A. don’t realize                    B. didn’t realize

    C. hadn’t realized                  D. haven’t realized

答案选B.“没意识到”是对方提醒之前的事。

Many of the world’s pollution problems have been caused by the crowding of large groups of people into the cities. Supply for the needs of the people leads to further   1  by industry. If the rapid increase of world 2  continues at the present rate, there may be much greater 3  to human beings. Some scientists 4  of the increase in numbers of people as “population pollution（人口公害）”.

About 2, 000 years ago, the world population was about 250 million. It  5 a billion in 1850. By 1930 the population was two billion. It is now six billion. It is  6 to double by the year 2020. If the population  7  to grow at the same rate, there will be 25 billion people in the 8   a hundred years from now.

Man has been 9   the earth’s resources more and more 10   over the past years. Some of them are almost gone. Now many people believe that man’s 11   problem is how to control the 12   of the population. The material supplies in the world will be far from enough to  13  the human population if the present rate of increase continues. There is already over-crowding（过分拥挤）in many cities and  14  in some countries. Many people believe that human survival（生存） in the future  15  on the answer to the question.

1.                A．progress        B．pollution        C．education D．production

2.                A．agriculture      B．industry        C．environment   D．population

3.                A．danger         B．harm           C．benefit   D．hardship

4.                A．dream         B．approve        C．rid  D．speak

5.                A．got            B．took           C．brought  D．reached

6.                A．suggested       B．hoped          C．expected D．said

7.                A．continues       B．fails            C．tries D．means

8.                A．world          B．country         C．star  D．end

9.                A．discovering      B．using           C．digging   D．destroying

10.               A．seriously       B．dangerously     C．rapidly    D．steadily

11.               A．greatest        B．easiest         C．lightest    D．simplest

12.               A．existence       B．start           C．growth    D．birth

13.               A．increase        B．decrease       C．report D．support

14.               A．discussion      B．starvation       C．construction    D．argument

15.               A．depends        B．agrees         C．saves D．passes

Even if you are naturally shy, these three tricks will help you to quickly build a new social circle in any new city.
1. Take pictures
One of the great things about taking pictures at an event or party is that it gives you an excuse to get in touch with the person later. Everybody loves seeing pictures of themselves, and it’s very easy after taking a picture to say “If you’d like I can email it to you”. This can be the seed that leads to new connections. The next time you hear about a fun event email your new contacts to let them know about it.
2. Eat alone in public
You might feel self-conscious eating by yourself but it has an important benefit: you are much easier to approach when you are alone. People may be afraid of interrupting you or being rude if you are in a conversation with someone else. Bring a book or newspaper to read (this will make you feel less self-conscious). Plus, having an interesting book with you will give others an excuse to start a conversation if they’ve read it.
3. Join a class, sports team, or club
Yoga, salsa dancing, volleyball, Toastmasters (a public speaking club), a class for work, etc. Take up a new hobby or continue an old one!
These are all great places to meet new people, primarily because you will be forced to see the same people over and over again in the class. You will automatically make friends with them if you have a common interest and are forced to see each other again.
Tips:
* In the beginning, never turn down an invitation from someone, even if it’s something you wouldn’t normally do.
* Email your new friends with fun things to do instead of always asking what their plans are. If they have a better plan you can drop yours and join them. This will help establish you as someone who is contributing value instead of just taking it (people want this in a friend).
* Don’t let little things in life upset you or be a negative person. People don’t want to be around someone like that!
【小题1】____ can give you an excuse to start new connections.