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
KEY: BABDC BACCD ABBCC
勾后母(打一英语短语) 谜底:go home(回家)
爱你猫(打一英文单词) 谜底:animal
女性对哪些来自男性的话最反感 下
托儿(打一英语单词) 谜底:tall
拜宝(打一英文单词) 谜底:bible
BDBDBBBDDDBBDDBD(打一英文常用语) 答案:long time no see(C)
The wisdom of life
安定(打一英文单词) 谜底:ending
服了我(打一英文单词) 谜底:flower
围棋(打一英语单词) 谜底:which
浮老哥(打一英文单词) 谜底:frog
死大的(打一英文单词) 谜底:study
We are on a journey
忘得(打一英文单词) 谜底:wonder
叶漏(打一英文单词) 谜底:yellow
女性对哪些来自男性的话最反感 上
一窝蚊子(打一英语单词) 谜底:involving
The unseen power of love
Q的(打一英语单词) 谜底:cute(可爱)
位子(打一英语单词) 谜底:with
老五(打一英文单词) 谜底:love
骚客(打一英文单词) 谜底:sock
Cherish every moment
图累死他(打一英文单词) 谜底:tourist
潲哇(打一英文单词) 谜底:shower阵雨
上下(打一英语单词) 谜底:sunshine
四围泼一泼(打一英语单词) 谜底:sweep
蚊都死(打一英文单词) 谜底:windows
小学生英语谜语带翻译 Will liars be honest after they die?
因死抓客神(打一英文单词) 谜底:instruction
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