______ polar bear population is ______ sensitive topic for the Canadian government, which allows limited hunting.
A．A; theB．A; aC．The; theD．The; a
D

考查冠詞。第一個空后的中心詞為北極熊的數(shù)量population，為特指。第二個空后的中心詞為topic，意思為一個敏感的話題，為泛指。故選D
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