1．(2020·全国卷Ⅱ)Hunters bring in more than 300,000 nutria tails a year, so part of Mouton's job these days is trying to promote fur. 促销
2．(2020·浙江卷)Researchers from the University of Leipzig in Germany gathered more than 1, 000 retired workers who were over age 75 and assessed the volunteers' memory and thinking skills through a battery of tests. 一系列
3．(2018·天津卷)A fire drill will be conducted in your residence hall every semester. 操练
