1．(2020·浙江卷)Others are so jammed that only a sharp reduction in the number of cars on the road will make a meaningful difference. 急剧的
2．(2020·浙江卷)Challenging work that requires lots of analytical thinking, planning and other managerial skills might help your brain stay sharp as you age... 敏锐的
3．(2019·全国卷Ⅲ)When a student attacks a professor on the social media, the language used actually says more about the student. 抨击
4．(2014·江西卷)The gun is given to him by the government. However, it is not used for hunting. In fact, a seal is fixed to it. 封条
