It is very _____ for a person to know how fast a car is traveling.(横线填空）六年级（第二学期）YLE P60页的选词填空题(understand，careful，fall down，difficult，within)

分类: 作业答案 • 2022-04-13 15:59:23

问题描述：

It is very _____ for a person to know how fast a car is traveling.(横线填空）
六年级（第二学期）YLE P60页的选词填空题(understand，careful，fall down，difficult，within)

答

difficult