Read the following passage on commuting, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 51 to 60.
Many folk cures which have been around for centuries may be more therapeutic than previously suspected. A case in point is that of penicillin Alexander Fleming did not just randomly choose cheese molds to study when he discovered this very important bacteria-killing substance. Moldy cheese was frequently given to patients as a remedy for illness at one time Fleming just isolated what it was about the cheese which cured the patients.
In parts of South America, a powder obtained from grinding sugar cane is used for healing infections in wounds and ulcers. This usage may date back to pre-Colombian times. Experiments carried out on several hundred patients indicate that ordinary sugar in high concentrations is lethal to bacteria. Its suction effect eliminates dead cells and it generates a glasslike layer which protects the wound and ensures healing.
Another example of folk medicine which scientists are investigating is that of Arab fishermen who rub their wounds with a venomous catfish to quicken healing. This catfish excretes a gellike slime which scientist found to contain antibiotics coagulant that helps close injured blood vessels, anti-inflammatory agents, and a chemical that directs production of a glue-like material that aids healing.
It is hoped that by documenting these folk remedies and experimenting to see if results are indeed beneficial, an analysis of the substance be made, and synthetic substances be developed for human consumption.
This passage is mainly about_________.
A. isolating antibiotics in cheese, sugar, and slime
B. antibiotics in the field of medicine
C. using folk medicines in place of modern medicines
D. the validity of folk remedies and their use for advances in modem medicine
Giải bởi qa.haylamdo.com
Đáp án là D. Dựa vào đoạn kết của bài. It is hoped that by documenting these folk remedies and
experimenting to see if results are indeed beneficial, (Người ta hy vọng rằng bằng cách ghi các bài thuốc
dân gian và thử nghiệm để xem nếu kết quả có thực sự mang lại lợi ích,)
Tony is so_________that his friends tend to tell him all their problems.
Impressed as we were by the new cinema, we found it rather expensive.
Do you know that there is a high rate in interest on this loan?
IX/ Mark the letterA,B,C or D on your answer sheet to indicate the sentence that is CLOSEST in meaning to each of the following questions.
If interest rates are cut, the economic situation may improve.
Commercial airliners do not fly in the vicinity of volcanic eruptions because even a small
amount of volcanic ash can damage its engines.
Designers are experimenting with a new material_________flexibly with lightness.
When you have a small child in the house, you_________leave small objects lying around. Such_________objects be swallowed, causing serious injury or even death.
III/ Mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following questions.
The educational quality is decidedly improved.
- Thuy: This file is very important. You should include it in our document.
- Thu: I know. It is_________.
