精选优质文档-倾情为你奉上 非谓语动词2014-2019高考真题2017-2019高考真题填空非谓语动词总结2019年全国卷 I 1. Modern methods of tracking polar bear populations have been employed only since the mid-1980s, and are expensive 64 _ (perform) consistently over a large area. 2.Scientists have responded by 67 _ (note) that hungry bears may be congregating (聚集) around human settlements, leading to the illusion (错觉) that populations are higher than they actually are.全国卷 II 3. A 90-year-old has been awar
