3.A coat can_____ for keeping warm.A.be used B.is used C.been used D.used

题目

3.A coat can_____ for keeping warm.A.be used B.is used C.been used D.used
选A,讲一讲为什么

答案

coat和use是被动关系,要用被动语态
can情态动词,后面接动词原型
所以用be used