1.（2019全国I卷）Of _____ nineteen recognized polar bear subpopulations, three are declining, six are stable, one is increasing, and nine lack enough data.
【答案】the
【解析】考查冠词。此处为特指，意为“在已知的19个北极熊亚种群中”，故填the。
2.（2019全国II卷）When we got a call saying she was short-listed，we thought it was ______ joke.
【答案】a
【解析】考查冠词。根据句意“我们还以为这是一个玩笑” 可知，此处joke为泛指，故填a。
3. （2019全国浙江卷）Everybody wears______ same style of clothes.
【答案】the
【解析】考查冠词。句意：每个人都穿相同风格的衣服。same是形容词，意思是“相同的”，常与the连用修饰名词。故填the。
