题目内容

【题目】

【1】In autumn, the temperature in this city _______(由…到…不等) from 10to 30 in a day.

2The rise in carbon dioxide is causing a ________(持续) increase in global warming.

3I was ____________(挥手)my hand madly but he never once looked in my direction.

4It’s many years since Mount Vesuvius last (爆发).

5Temperatures are expected to be in the __________(范围) of 75 to 85 degrees.

6I can’t ____________ (评价) his ability without seeing his work.

7I got into a ____________ (惊慌) when I found the door was locked.

8He studied the German market to find the ___________ (可能性) there for investment.

9We had ____________(绝对地) no intention of stopping our business.

【10Remember-your (贡献)counts..

答案

【1】varies

2steady

3waving

4erupted

5range

6evaluate

7panic

8potential

9absolutely

【10contribution

解析

【1】主语温度是不可数名词,谓语动词用单数,填varies

2形容词修饰名词,填steady

3过去进行时的构成:be动词+doing,填waving

4since 后用一般过去时,填erupted

5冠词后填名词.range

6情态动词后用动词原形,填evaluate

7冠词后填名词panic

8】.冠词后填名词potential

9副词修饰动词,填absolutely

【10代词后用名词,谓语动词用单数,主语也用单数填contribution

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【题目】Harvard researchers have created a tough, low-cost, biodegradable (可生物降解的) material inspired by insects' hard outer shells. The material's inventors say it has a number of possible uses and someday could provide a more environmentally friendly alternative to plastic. The material, made from shrimp (奸) shells and proteins produced from silk, is called "shrilk. "It is thin, clear, flexible and strong.

A major benefit of the material is its biodegradability. Plastic's toughness and flexibility represented a revolution in materials science during the 1950s and 60s. Decades later, however, plastic's very durability (耐用性) is raising questions about how appropriate it is for one-time products such as plastic bags, or short-lived consumer goods, used in the home for a few years and then cast into a landfill where they will degrade for centuries. What is the point of making something that lasts 1, 000 years?

Shrilk not only will degrade in a landfill, but its basic components are used as fertilizer (肥料), and so will enrich the soil.

Shrilk has great potential, the inventors said. Materials from which it is made are plentiful in nature, found in everything ranging from shrimp shells, insect bodies to living plants. That makes shrilk low cost, and its mass production possible should it be used for products demanding a lot of material.

Work on shrilk is continuing in the lab. The inventors said the material becomes flexible when wet, so they're exploring ways to use it in wet environments. They're also developing simpler production processes, which could be used for non-medical products, like for computer cases and other products inside the home. They're even exploring combining it with other materials, like carbon fibers, to give it new properties.

【1】Paragraph 1 of the passage is mainly about shrilk's __________.

A. remarkable design B. interesting name

C. major features D. basic elements

【2】What has become a concern about plastic?

A. Using it properly.

B. Producing it cheaply.

C. Developing its properties quickly.

D. Evaluating its contributions fairly.

【3】According to the inventors, shrilk has great potential partly because __________.

A. it can help plastic degrade

B. it can be found in living things

C. its mass production has been realized

D. its raw materials are abundant in nature

【4】What are the inventors doing in the lab?

A. Replacing carbon fibers with shrilk.

B. Testing shrilk's use in wet conditions.

C. Making shrilk out of used household goods.

D. Improving shrilk's flexibility for medical purposes.

【5】Which of the following can be the best title for the passage?

A. Recent Progress in Environmental Protection

B. Benefits of Insects in Scientific Research

C. The Harm of One-time Products

D. A Possible Alternative to Plastic

【题目】Deserts are found where there is little rainfall or where rain for a whole year falls in only a few weeks time. Then inches of rain may be enough for many plants to survive if the rain is spread throughout the year. If it falls within one or two months and the rest of the year is dry, those plants may die and a desert may form.

Sand begins as tiny pieces of rock that get smaller and smaller as wind and weather wear them down. Sand dunes (沙丘) are formed as winds move the sand across the desert. Bit by bit, the dunes grow over the years, always moving with the winds and changing the shape. Most of them are only a few feet tall, but they can grow to be several hundred feet high.

There is, however, much more to a desert than sand. In the deserts of the Southwestern United States, cliffs (悬崖) and deep valleys were formed from thick mud that once lay beneath a sea more than millions of years ago. Over the centuries, the water dried up. Wind, sand, rain, heat and cold all wore away at the remaining rocks. The faces of the desert mountains are always changing very, very slowly as these forces of nature continue to work on the rock.

Most deserts have a surprising variety of life. There are plants, animals and insects that have adapted to life in the desert. During the heat of the day, a visitor may see very few signs of living things, but as the air begins to cool in the evening, the desert comes to life. As the sun begins to rise again in the sky, the desert once again becomes quiet and lonely.

【1Many plants may survive in deserts when ________.

A.the rain is spread out in a year

B.the rain falls only in a few weeks

C. there is little rain in a year

D. it is dry all the year round

【2Sand dunes are formed when ________.

A. sand piles up gradually

B. there is plenty of rain in a year

C. the sea has dried up over the years

D. pieces of rock get smaller

【3The underlined sentence in the third paragraph probably means that in a desert there is ________.

A. too much sand

B. more sand than before

C. nothing except sand

D. something else besides sand

【4It can be learned from the text that in a desert ________.

A. there is no rainfall throughout the year

B. life exists in rough conditions

C. all sand dunes are a few feet high

D. rocks are worn away only by wind and heat

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