人教版（2019）高中英语必修第二册：Unit 2 Wildlife protection 单元测试（含答案与解析）

Unit 2 单元测试 一、阅读理解（共两节，满分35分） 第一节（共10小题，每小题2.5分，满分25分） 阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。 A More than two thirds of the world’s polar bears will be wiped out by 2050, according to a shocking new study. By then, scientists say, global warming will have melted 42 percent of the Arctic sea ice. By 2100, only a very few of these important creatures will be left. The report has been produced by the US Geological Survey. The scientists have publicized their findings in the hope of influencing US Interior Secretary Dirk Kempthorne, who has been asked to put polar bears on the US endangered species list. Polar bears depend on floating sea ice as a platform for hunting seals, which are their main food. Without enough ice, polar bears would be forced to go onto the land, where they are killed by hunters, and would be unlikely to adapt to the life on the land in time. Experts say few little bears would survive and the stress could make many females unable to get pregnant. The team of American and