1) L55-1. It has __________ more than four billion years for plant and animal life to evolve on earth. a) a. lasted b) b, spent c) c. taken 2) 2. That star is two __________ larger, brighter and hotter than our sun. a) a. more b) b. far c) c. times 3) 3. The big trees__________our view of the mountain in the distance. a) a. stop b) b. obstacle c) c. blot out 4) 4. The earth is just one of the countless __________ in the Milky Way. a) a. systems b) b. physical body c) c. planets 5) 5. Besides the Milky Way, there are other__________in this infinitely large universe. a) a. planets b) b. galaxies c) c. stars 6) 6. Whether a family can adopt a child also__________, to a certain degree, on the family's financial situation. a) a. depends b) b. determines c) c. decides 7) 7. A planet would have to be a long way from its star __________capable of supporting life. a) a. being b) b. before c) c. to be 8) 8. The old boarding school provided perfect conditions __________the children to develop their academic interests. a) a. to b) b. with c) c. for 9) 9. So far, the satellite__________orbit round the earth has been functioning well. a) a. following b) b. in c) c. on  10) 10. The__________we travel towards the outer edges of our own solar system, the thinner the dust becomes. a) a. longer b) b. further c) c. wider 11) 11. Despite their__________ , the men failed to reach their goal. a) a. endeavour b) b. trying c) c. struggling 12) 12. You won't find him difficult to deal with__________you have got to know him. a) a. only if b) b. once c) c. while 13) 13. Our existence depends on the oxygen __________ by various plants. a) a. sent b) b. breathed c) c. generated 14) 14. If we were ever to discover__________forms of life such as bacteria on other planets, it would change the direction of human life. a) a. low b) b. lowly c) c. developed 15) 15. Because of the existence of dust__________in our solar system, even such famous telescopes as the Hubble telescope are unable to undertake the task of looking for life on other planets. a) a. existing b) b. particles c) c. essence 16) 16. We __________ cherish the hope that one day in the future some little green men will visit us and bring us a more advanced civilisation. a) a. man b) b. beings c) c. earth-dwellers 17) L55-17. The meat was __________ and found to contain small amounts of poison. a) a. checked b) b. analyzed c) c. cleaned

L55-NCE03

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