1．(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，a study published Wednesday in the journal Neurology suggests.adj.灵敏的，机警的
2．(2019·天津卷)Reading is a vital part of my life.Reading satisfies my desire to keep learning.adj. 必要的；至关重要的
3．(2019·全国卷Ⅱ)That relief is coupled with a deep understanding of why the same people keep coming back for more...v.伴随
4．(2018·北京卷)14 hours later the films had lost 13% of their mass — apparently broken down by enzymes (酶) from the worms' stomachs.n.质量
