The present campaigns that doctors have begun are______.

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The present campaigns that doctors have begun are______.

A. to save or rescue more than two million people

B. to reveal the fight between doctors and mosquitoes

C. to support the WHO's effects in destroying mosquitoes

D. to kill all malaria-bearing mosquitoes before their resistance becomes too great

参考答案:

D[解析] 见最后一段第一句话。