The development of Rubber
Here is the story of rubber. From the earliest time it was common knowledge to the Peruvians that when a cut was made in the outside skin of a rubber tree, a white liquid ___ milk came out, and that ___ this a sticky1 mass of rubber might be made. This rubber is soft when warm, so that it is possible to give it any ___. The Peruvians made the ___ that it was very good for keeping out wet. Then in the early 1800's, the Americans made use of it for the first time. First they made overshoes to ___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 ___, and our raincoats are still named after him.
But these first rubber overshoes and raincoats were all soft and sticky in summer, and ___and inelastic in the winter when it was cold. But the rubber we have today is soft and elastic2 , ___ very strong -- even in the warmest summer and the coldest winter. This was made ___ by a man called Goodyear. After many ___, he found that nitric acid3 made the rubber much better, but it is not hard and strong enough. Then a strange thing took ___. A friend of his, Nicholas Hayward, had the idea in this sleep that rubber might be made hard and strong if fixed4 with sulfur5 and put in the sun. Goodyear put this idea ___ the test, and saw that it did have more or less the desired effect -- though somewhat6 less than more. The only effect it had was on the outside of the rubber. It is common knowledge now that the ___ to make rubber hard and strong is by heating7 it with sulfur. It took Goodyear four more years to find this method. When at last he did it, he had ___ at all. Everything of the smallest value had been used to get money, even his sons' school-books,
1. A)for B)to C) about D)with
2. A) like B)alike C)re百度竞价推广bled D)similar
3. A) on B)from C)up D)in
4. A)use B)heat C)pressure D)form
5. A)creation B)invention C)discovery D)recognition
6. A)retain B)keep ```` C)hold D)set
7. A)did B)built C)tried D)conducted
8. A)weak B)gentle C)hard D)strong
9. A)or B)however C)though D)even
10. A)capable B)probable C)practical D)possible
11. A)experiments B)checks C)discoveries D)works8
12. A)form B)place C)shape D)size
13. A) on B)to `` C)in ``` D)with
14. A) system B)style C)way D)direction
15. A) everything B)anything C)nothing D)something
参考答案：
1.Choose the best answer：
答案1。B; 2。D;
答案1。A; 2。B;
答案1。A;
2.Put in the or a if necessary:
the, the, the, the, /, then , /, the, the, an, an
3.What do the three it refer to?/下面三个it分别指代什么?
it1: dyslexia
it2: dyslexia
it3: baby
4.Fill in each blank with the best answer from the four given choices/从每一个选项下所给出的四个被选项中选择一个最好答案。
1.B.解题思路：被选项是介词时关注空格前后与之搭配的结构 --总是是其前面的动词，名词，形容词和其后面所带的宾语。该空格后是某种人作宾语，再结合句意判断B。
2.A.解题思路: 关注被选项中的关系项。第一重点关注A和B。再借用空格后的搭配结构--带名词作宾语，判断答案为A
3.B.解题思路：被选项是介词时关注空格前后与之搭配的结构。空格处与被选介词搭配的是动词 made。该句陈述句句的结构是：a sticky mass of rubber might be made this.
4.D.借用句意判断答案成型合理。
5.C.借用句意判断发现合理。
6.B.解题思路：借用与被选动词搭配用的结构选择答案。keep their feet dry是答案。
7.A.解题思路：借用被选动词所在的结构。as Mr. Mackintosh did.是省略句。
8.C.借用前文，则冬季硬。
9.C.解题思路：被选项中出现副词时总是要借用句意选择答案。借用句意选择C。
10.D.该题考察同义词的辨析。make sth./it possible是习惯搭配结构
11.A.借用句意判断实验是答案。work: 劳动;操作;作业;功课;工作;职业著作，作品, 工厂;如：Shakespeare's works /莎士比亚著作;a gas works /煤气厂 容易见到短语：at work; out of work; hard work; in the works
12.B.解题思路：借用习惯搭配。take place是发生。take shape 是成形, 形成, 具体化，在借用句意判断答案。
13.B.解题思路：借用与被选项介词搭配的结构。
put to the test/使受试验
put to use/用, 借助
14.C.解题思路：借用与被选项名词搭配用的不定式结构。只有way带不定式结构作定语。
indirection 在的方向上
15.C.解题思路：借用左右结构。not..at all是固定搭配结构
