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
答案 :BABDC BACCD ABBCC
国际英语资讯:Possible second Kim-Trump summit brings opportunity, challenge -- U.S. experts
体坛英语资讯:Spain thrash Croatia 6-0 in UEFA Nations League
体坛英语资讯:Hungary beats Greece 2-1 in the UEFA Nations League
国际英语资讯:President Trump signs spending bill to avoid govt shutdown
报告显示 机器人创造的岗位是替代掉的两倍
国际英语资讯:Indonesian president calls for relief measures after strong quakes hit C. Sulawesi province
国内英语资讯:Chinas top political advisor stresses ethnic solidarity
双语阅读:美、日致力达成自由贸易协定
My Opinion Towards I AM A SINGER 我看《我是歌手》
Whether College Study Is Necessary? 大学学习是否有必要?
研究发现 喝完不同的酒后心情也会不一样
国际英语资讯:Google to partially lift ban on advertising of cryptocurrency-related business
体坛英语资讯:Del Potro filled with happiness by Djokovic gesture
国内英语资讯:China confers Friendship Award to foreign experts
国内英语资讯:Vice premier meets Hong Kong trade union delegation
国内英语资讯:Chinas participation in Russian drills contributing to regional peace: spokesperson
My Teacher Quality View 我的教师素质观
国内英语资讯:China, Japan hold political dialogue, pledging to enhance strategic communication
国内英语资讯:Spotlight: Chinese FM endorses multilateralism, peace, free trade at UNGA
国际英语资讯:Trudeau defends negotiators after Trump slams Canada
国际英语资讯:Numbers of Burundian refugees return from Tanzania hardly to meet target: official
One Thing I Experienced 亲身经历的一件事
国际英语资讯:Italy to boost investment in Tunisia to stem illegal immigration
Shopping on the Internet 网上购物之我见
国内英语资讯:Top legislator stresses Xis thought in advancing peoples congresses system
国际英语资讯:Leading Bangladeshi, Chinese universities share experience in tackling climate change
国内英语资讯:Chinas peaceful development brings more opportunities to world: FM
体坛英语资讯:Russias Dina Averina wins first two golds in Rhythmic gymnastics worlds in Sofia
国内英语资讯:China summons news portal websites for copyright protection
国内英语资讯:China welcomes improving situation on Korean Peninsula: FM