根据英语释义及首字母提示,完成单词

【fear 担心】 feel worried that something bad may happen
【rule 规则】 the way that you follow to get from one place to another
【population 人口】 the number of people living in a place
【embarkment 登船,登机等】 the movement of people or goods by planes,ships,or trains...
【environment 环境】 the air,water,and land in which people,animals,and plants live

1 fear
2 railway

5 earth
不好意思，3、4没看出来，可以结合你们近期学的单词，回顾一下

fear
route
population
export
environment
仅供参考。。。