Unit 1 Great Scientists（60 分钟 巩固训练）一、单项选择 (共 15 小题，每小题 1 分, 满分 15 分。)1.The invention of steam engine greatly sped up the industrial revolution, which _____ a lot to the take-off of the world. A. led B. contributed C. constructed D. exposed 2. From my point of view, the theory that ______ by the scientist is not quite scientific. A. was risen B. brought up C. had been raised D. was put forward 3. It is clear that no use can be made ______radium _____ we don’t know clearly the characteristics of it. A. from; if B. of; unless C. from; unless D. of; if 4. We have to ______ everything question in detail ______ we take action. A. conclude; before B. make analysis of; when C. expose; until D. analyze; before 5. It will be many years ______the doctors and medical scientists can find _____ for cancer. A. since; cures B. when; treatments C. before; cures D. until; treatments 6. After several years of observation, the research group ______ the conclusion that language acquisition is faster when students ______ to the situation where it is spoken. A. has come to; expose B. have arrived at; are exposed C. has concluded; are exposed D. have reached; expose 7. Samples of blood from Cholera infected patients have been sent to the blood center _______. A. to be checked B. to be examined C. to test D. being tested 8. It has been announced by our provincial government that another two medical teams will be sent to ______ the injured people in the severe earthquake. A. join to B. join in C. take part in D. attend 9. ______ the aids from the outside, the positive attitude of the disaster-stricken people _____ the key role in the reconstruction of their destroyed t...
