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When the Causeys first started hunting virus,they planned to catch monkeys and check their blood to see what viruses and antibodies were present.Dr.Causey was very good -1- catching these animals.While in Central Brazil studying the movement of jungle -2-,he had caught some 24 hundreds of them and expected similar -3- with those on the Amazon.4,on his arrivalin Belem,Dr.Causey failed to catch a -5- monkey -6- repeated attempts.He discussed his -7- with Mrs.Causey and with -8- hunters.Then the doctor decided there were so many large animals in the jungle near Belem that monkeys had learned never to come to the -9-. Those that didn‘t learn didn‘t live long enough to be caught.
At this point Dr.Causey heard of some monkeys that were often seen on the ground on the island off the mainland -10- south of the Amazon.So he went there to try his luck again.This time he was able to catch alarge number of animals.He -11- their blood and sent it to New York. He needed to know which viruses the monkeys had been exposed to.The antibodies would -12- that.
New York reported back that none of the animals had any viruses whatever."It was a gift from the gods,the weather gods,"Dr.Causey said later.The -13- of the winds in that area made it difficult for the mosquitoes to cross from the mainland.So these monkeys were in perfect condition for any disease waiting for them in the jungle.
The Causeys put their animals in cages open to the air but completely -14- by wire netting.These cages hung from trees in the jungle far enough up so that large animals could not -15- to them but at a height convenient for mosquitoes.
Soon the Causeys found 3 monkeys -16- by 3 viruses.10 months later when the animals were taken out of the forest 19out of 44animals had become infected.
When the fever out break was at its height,the Causeys -17- 4 other monkeys in another forest to see ifthe fever virus existed there.No fever was found in those animals,but 4 other viruses were -18- from them.A dozen other monkeys were placed in yetanother districtand -19- 13 more.
The Causeys spentyears in their studies on viruses and -20- a magnificent success at last.
1. [A] for [B] of [C] to [D] at
2. [A] fever[B] cold [C] trouble [D] attack
3. [A] result [B] success [C] consequence [D] outcome
4. [A] Furthermore [B] Instead [C] Moreover [D] Nevertheless
5. [A] single [B] unique [C] odd [D] alone
6. [A] even if [B] though [C] through [D] in spite of
7. [A] doubt[B] barrier [C] problem [D] suspicion
8. [A] area [B] rural [C] local[D] territory
9. [A] ground [B] earth [C] soil [D] land
10. [A] bank [B] coast [C] embankment [D] beach
11. [A] absorbed [B] donated [C] drew [D] infused
12. [A] show [B] appear [C] express [D] display
13. [A] tendency [B] position [C] location [D] direction
14. [A] shut [B] closed [C] enclosed [D] locked
15. [A] bound[B] leap [C] spring [D] hop
16. [A] infected [B] transmitted [C] spread [D] transferred
17. [A] installed[B] stationed [C] mounted [D] sent
18. [A] captured [B] caught [C] achieved [D] obtained
19. [A] increased[B] developed [C] grew [D] yielded
20. [A] expected [B] acquired [C] attained [D] deserved |
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发表于 2016-7-11 20:11:12