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一、阅读理解。

A

As people slowly learn to cure diseases, control floods, prevent hunger, and stop wars, fewer people die every year. As a result, the population of the world is becoming larger. In 1925 there were about 2 billion people in the world; today there are over 6 billion.

When the number rises, extra mouths must be fed. New lands must be brought under development, or land already farmed must be made to produce more crops. In some areas the land is so over-developed that it will be difficult to make it provide more crops. In some areas the population is so large that the land is divided into too tiny units to make improvement possible with farming methods. If a large part of this farming population went into industrial work, the land might be farmed much more productively (多产地) with modern methods.

There is now a race for science, technology, and industry to keep the output of food rising faster than the number of people to be fed. New types of crops, which will grow well in bad weather, are being developed, so there are now farms beyond the Arctic Circle in Siberia and North America. Irrigation (灌溉) and dry-farming methods bring poor lands under the plough. Dams(大坝) hold back the waters of great rivers, which can provide water for the fields in all seasons and provide electric power for new industries. Industrial chemistry provides fertilizer to suit different soils. Every year, some new methods are made to increase or to protect the food of the world.

1. The author says that the world population is increasing because _____.

A. there are many rich valleys and large fields

B. farmers are producing more crops than before

C. people are living longer due to better living conditions

D. new lands are being made into farmlands

2. The author says that in areas with large populations, land might be more productively farmed if _____.

A. the land was divided into smaller pieces

B. people moved into the countryside

C. industrial methods were used in farming

D. the units of land were much larger

3. We are told that there are now farms beyond the Arctic Circle. This has been made possible by _____.

A. growing new types of crops B. irrigation and dry-farming means

C. providing fertilizers      D. destroying pests and diseases

4. Why is the land divided into tiny units in some areas?

A. There are too many people living there.

B. It saves more natural resources there.

C. It prevents crops from serious diseases there.

D. Farmers can grow various kinds of crops there.

5. Why do some people use dams to hold back waters from great rivers?

A. To develop a new kind of dry-farming methods.

B. To prevent crops from floods.

C. To provide water and electricity in all seasons.

D. To water poor lands in bad weather.

B

Planting is no easy thing. Farmers have to struggle in their fields all year round to sow(播种) the seeds, apply fertilizer, protect the products and worry about bad weather. However, even with all this work, they may not get a good harvest. One of the reasons is that fields are often treated in the same way, which is actually against the law of nature. The same plant, growing in two different fields, will face very different growing conditions, for example, in the number of weeds and pests. Thus, if farming can be done according to different conditions, the crop output is certain to increase.

To solve this problem, a new idea called “precision (精确) farming” has recently been attracting more and more farmers’ attention. “Precision farming” means gathering information electronically from a field and then putting the information into a computer. After that, the computer will deal with the information, and control the equipment in the field. Precision farming must be based on the GPS, since messages from several satellites should first make sure of the agricultural condition. In this way, a lot of farming work can be finished electronically, such as taking soil samples (样本), measurement of field areas, and applying fertilizer.

Moreover, as a lot of unnecessary fertilizer can be saved with this method, the new technology is very good for environmental protection. Farmers are certain to save a lot of money and lead a much easier life!

6. According to the passage, farmers may not get a good harvest because _____________.

A. the fields are often treated in the same way

B. too many different plants grow in one field

C. different weeds and pests live in one field

D. different fields have different conditions

7. “Precision farming” is a new concept ___________.

A. invented by farmers and used in agriculture

B. that information is dealt with by scientists

C. which is based on global positioning system

D. in which equipment is controlled by men working in the field

8. Many farming tasks can be finished electronically, EXCEPT__________.

A. taking soil samples    B. measurement of field areas

C. applying fertilizer      D. producing unnecessary fertilizer

9.According to the new technology, which of the following is wrong?

A. Necessary fertilizer can be saved.

B. A lot of money can be saved.

C. It is very good for environmental protection.

D. Farmers are certain to lead a much easier life!

10. When translated into Chinese, GPS is__________.

A.全球定位系统                 B.全球教育论坛

C.世界贸易组织                 D.世界银行

二、书面表达。

假设你是郑州市第五中学的学生陈楠，你学校本周的课外小组活动是英文广告设计比赛，你的参赛广告是为某绿色食品生产商宣传其产品 — 有机苹果。内容设计如下：

绿色食品;

名字：有机苹果;

产地：广东;

生长环境：无化学肥料;

优点：食用安全，富含矿物质;

适合人群：所有追求健康的人。

【写作要求】

1. 必须使用120个左右的单词表达全部的内容;

2. 广告的开头和结尾已给出，不计入总词数;

3. 参考词汇：conventionally按照惯例地。

Ladies and gentlemen,

It’s time to try new things.

Thank you very much.

Yours truly!

最后，希望精品小编整理的高二英语必修4单元练习题对您有所帮助，祝同学们学习进步。

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