But these first rubber overshoes and raincoats were all soft and sticky in summer， and ___(8)and inelastic(无弹性的) in the winter when it was cold. But the rubber we have today is soft and elastic (有弹性的)， ___(9) very strong -- even in the warmest summer and the coldest winter. This was made ___(10) by a man called Goodyear. After many ___(11)， he found that nitric acid (硝酸) made the rubber much better， but it is not hard and strong enough. Then a strange thing took ___(12). A friend of his， Nicholas Hayward， had the idea in this sleep that rubber might be made hard and strong if fixed with sulfur (硫磺)(if fixed with sulfur/如果用硫磺进行加固) and put in the sun. Goodyear put this idea ___(13) the test， and saw that it did have more or less the desired (所希望的)effect -- though somewhat less than more. The only effect it had was on the outside of the rubber. It is common knowledge(common knowledge：常识) now that the ___(14) to make rubber hard and strong is by heating it with sulfur. It took Goodyear four more years to find this method. When at last he did it， he had ___(15) 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)resembled 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)works
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：(选自职称英语考试指定用书)
(cultural Differences 难度B，C级)
答案1.B; 2.D;
(Canned Foods： Convenience and Nutrition 难度B，C级)
答案1.A; 2.B;
(Canned Foods： Convenience and Nutrition 难度B，C级)
答案1.A;
2.Put in "the" or "a (an)" 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? (Dyslexia 难度B，C级)
it1： dyslexia
it2： dyslexia
it3： baby