精选优质文档-倾情为你奉上最新高考英语考前冲刺语法填空短文改错精准训练 历年语法填空真题20套Passage 1(2019课标全国I)The polar bear is found in the Arctic Circle and some big land masses as far south as Newfoundland. While they are rare north of 88,there is evidence 1 they range all the way across the Arctic, and as far south as James Bay in Canada. It is difficult to figure out a global population of polar bears as much of the range has been 2 (poor) studied; however, biologists calculate that there are about 20,000-25,000
