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If we do not deal with ________ problem caused by air pollution, our planet may no longer be ________ healthy place for us.
A.a; theB.a; a
C.the; a D.the; the
C
C 考察冠词。句义:如果我们不处理由空气污染造成的问题,我们这个星球队我们来说不再是一个健康的地方。第一空特指由空气污染导致的问题,使用the;第二空泛指一个地方,用不定冠词a。
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