A. SELF B. ELSE C. OWN D. SHELF READ THE FOLLOWING PASSAGE AND M...

Câu 35: A. self B. else C. own D. shelf

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct

answer to each of the questions.

Probably the most important factor governing the severity of forest fires is weather. Hot, dry weather

lowers the moisture content of fuels. Once a fire has started, wind is etremely critical because it influences

the oxygen supply and the rate of spread. Forest type and forest conditions are also important factors. For

example, fire is more likely to occur in conifers than in hardwoods; slash-covered or brushy areas are

especially hazardous because the rate at which combustion consumes fuel is proportional to fuel volume.

Some fires are caused by lightning; others are caused by people. Those caused by people may be

accidental or intentional (incendiary). The causes of fire in the United States show large regional

differences. In the Rocky Mountains more than 70 percent of the fires are caused by lightning, whereas

incendiary fires amount to only about 1 percent. In contrast, more than 40 percent of the fires in the South

are incendiary, whereas lightning causes only 1 percent.