A. WHILE B. DURING C. WHEN D. ONCE(61-65). READ THE PASSAGE BELOW...

60. a. while

b. during

c. when

d. once

(61-65). Read the passage below carefully and choose the correct answer a, b, cor d.

Hundreds of thousands of persons each year fall prey to some type of cancer, but new

methods of radiation therapy have enabled doctors to save more lives than ever before.

Medical researchers have developed several experimental forms of this time-honoured

cancer treatment that seem effective in fighting the disease.

One promising approach involves exposing cancer cells to radiation by implanting a

radioactive source directly into the malignant tissue. This process greatly increases the

dosage and thus the effectiveness of the treatment. Another technique uses drugs to make

cancer cells more susceptible to the effects of radiation and to make normal cells more

resistant. Certain hugs are able to neutralize the genetic framework of cancer cells, thus

making them easily affected by radiation. Both techniques have seen some positive

results in the treatment of inoperable brain tumors.

These and other methods have helped to raise the recovery rate for cancer victims from

30 percent 40 years ago to around 50 percent today. This is encouraging news for those

who fall prey to one of the world’s leading killers.

-radiation therapy (n): xạ trị

– to implant (v): cấy, ghép (vào cơ thể)

– susceptible (adj): dễ bị ảnh hưởng

– tumor (n): khối u

” inoperable (adj): không thể phẫu thuật