2019 考博英语 完形填空练习题附答案解析（六）
考博英语复习不仅需要记忆大量知识，还需要考生们平时多做考博英语单项练习，旭晨教育考博频道整理了2019考博英语完形填空练习及答案，希望考生们多加练习，考博英语顺利过关。
A potful of evidence suggests that the antioxidants and polyphenols in tea help protect you from stroke and heart attack, Alzheimer's disease, arthritis, and cancers of the lung, mouth, breast, pancreas, prostate and skin. The essential oils found in the leaves even aid 1 by increasing the flow of digestive juices.
Now it turns out that tea, 2 chicken soup or echinacea, is what can give your body an extra 3 to help it battle infections.
Given 20 ounces of tea daily, non-tea drinkers were better able to fight 4 bacterial diseases, according to a study at Brigham and Women's Hospital in Boston. The researchers 5 L-theanine, an 6 found in black, green, oolong and pekoe teas--but not in 7 teas, which usually don't contain Camellia sinensis, the one true tea 8 .
When broken down by the liver, L-theanine becomes an antigen called ethylamine, 9 primes the response of gamma-delta T cells against a 10 of bacterial, viral, fungal and parasitic 11 , and possibly tumors. (Ethylamine is also found in other plant-based foods, such as apples, mushrooms and wine.)
In the study, blood samples from new tea drinkers were 12 to E. coli, bacteria 13 food poisoning and ulcers. The 14 cells in the tea drinkers produced five times the interferon―an important element of the body's 15 system--than they had before tea was 16 . No change was noted in a 17 group of coffee drinkers.
“I don’tthink there’s a 18 to [drinking tea],” says co-author Jack F. Bukowski, M.D, of Harvard Medical School. While tea won’t 19 you or make you immune from illness, “people who do get sick will probably get a milder 20 ,” Bukowski says.
1. A. deterioration B. digestion C. destination D. distinction
2. A. other than B. rather than C. better than D. more than
3. A. kick B. kit C. kite D. kid
4. A. off B. against C. with D. for
5. A. praise B. acknowledge C. credit D. create
6. A. item B. instance C. information D. ingredient
7. A. herbal B.credible C. favorable D. fashionable
8. A. product B. package C. producer D. plant
9. A. whichB. thatC. who D. where
10. A. lot B. number C. variety D. range
11. A. diseases B. infections C. illnesses D. deficiencies
12. A. exposed B. opposed C. disclosed D. proposed
13. A. connected with B. combined with C. referred to D. linked to
14. A. immense B. important C. immediate D. immune
15. A. defeat B. defense C. decrease D. disease
16. A. introduced B. increased C. indulged D. indicated
17. A. compare B. control C. contrast D. consent
18. A. downside B. upside C. inside D. outside
19. A. heal B. treatC. cure D. remedy
20. A. illness B. diseaseC. sickness D. case
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