polar bear population is sensitive topic for the Canadian government, which allows limited hunting.
A. A; the
B. A; a
C. The; the
D. The; a
网友回答
A. A; the
B. A; a
C. The; the
(答案→)D. The; a
解析：
考查冠词。第一个空后的中心词为北极熊的数量population，为特指。第二个空后的中心词为topic，意思为一个敏感的话题，为泛指。故选D