BUSHFIRES

Câu hỏi: Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer for each of the blanks from 25 to 29.
BUSHFIRES
Australia (0) suffers more bushfires - wildfires which burn out of control - than any other country in the world. Most bushfires happen when temperatures are (25) ____________ and conditions are dry and windy. One reason why Australia is so susceptible to bush fires is because the leaves of the native eucalypt trees contain a highly-flammable oil which easily (26) ____________fire.
Approximately one quarter of all fires are started by lightning strikes, but the vast majority are caused by the (27) ____________ of humans. Not all, however, are accidental; around 25 per cent are deliberate. The most obvious result of bushfires is the loss of plant, animal and human life and (28) ____________ to property.
But the effects of bushfires are not all negative as fire generates regrowth. Some species of eucalyptus, for instance, would be unable to reproduce otherwise as fire splits open the seed pods, (29) ____________ them to germinate.
The word or phrase which best fits the gap (29) is...
A. letting
B. allowing
C. making
D. causing