The Development of Rubber
Here is the story of rubber. From the earliest time it was __1__ common knowledge to the Peruvians that when a cut was made in the outside skin of a rubber tree, a white liquid __2__ milk came out, and that __3__ this a sticky mass of rubber might be made. This rubber is soft when warm, so that it is possible to give it any __4__. The Peruvians made the discovery that it was very good for keeping out __5__. Then in the early 1800s, the Americans made use of it for the first time. First they made overshoes __6__ their feet dry. Then came a certain Mr. Mackintosh, who made coats of cloth covered with natural rubber. From that day to this we have been coating cloth with rubber as Mr. Mackintosh __7__, and our raincoats are still named after him.
But these first rubber overshoes and raincoats were all soft and sticky in summer, and __8__ and inelastic in the winter when it was cold. But the rubber we have today is soft and elastic, though very strong---even in the __9__ summer and the coldest winter. This was made __10__ by a man called Goodyear. __11__ experiments, he found that nitric acid made the rubber much better, but it is not hard and strong enough. Then strange thing took place. A friend of __12__, Nicholas Hayward, had the idea in his sleep that rubber might be made hard and strong if mixed with sulphur and put in the sun. Goodyear put this idea __13__ the test, and saw that it did have more or less the desired effect---though somewhat less than more. The only effect it had was on the outside of the rubber. It is common knowledge now that the way to make rubber hard and strong is __14__ sulphur. It took Goodyear four more years to find this method. When at last he did it, he had nothing at all. Everything of the smallest value __15__ to get money, even his sons school-books.
1. A) a
B)
C) an
D) the
2. A) like
B) alike
C) in the form of
D) similar
3. A) with
B) from
C) up
D) of
4. A) thing
B) heat
C) press
D) form
5. A) wet weather
B) wet day
C) the wet
D) wet
6. A) to make
B) to keep
C) make
D) keep
7. A) did
B) had done
C) has done
D) was doing
8. A) cold
B) cool
C) hard
D) strong
9. A) warmer
B) warm
C) warmest
D) warm-up
10. A) impossible
B) possibly
C) possibility
D) possible
11. A) After many
B) With an
C) Having made much
D) With regard to
12. A) him
B) his
C) them
D) theirs
13. A) on
B) to
C) in
D) with
14. A) to heat with
B) to heat it by
C) by heating it with
D) by heating with
15. A) was used
B) had used
C) had been used
D) was being used
市民英语会话-遗憾与道歉篇
介绍旅行小贴士[1]
面试英语第12章:询问结果(音频)
点菜之主菜凉菜和饮料
为健康而吃[1]
写英文简历时的常用词汇
介绍酸橙派作法[1]
介绍位于加拿大的家乡[1]
介绍自行车保养秘方[1]
讲述迷路经历并提供建议[1]
担心惦念[1]
面试英语第18章:教你如何回答面试中的必答题
面试中的棘手问题要如何回答
口语要素228例精选
介绍戒烟诀窍[1]
谈论美国总统[1]
英语口语-NBA篮球实用术语
介绍最喜爱的夜店[1]
面试英语:十个问题让你掌握主动权
市民英语会话-银行篇
在加油站给租来的车加油
讲述骑车日记[1]
求职信结构知多少?
面试英语第20章:面试精彩问答集锦
面试英语第15章:应聘秘书(音频)
讨论青年人的生活变化[1]
求职英语:从简历到面试的实用指导
市民英语会话-问候篇
面试中英语问题实例
市民英语会话-乘出租车篇
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |