1.Dad,please open the door.It _____ (lock). OK,I'm coming. 2.We all know that a storm _____ (follow) by a calm. 3.You know my hair _____ (cut) once every four weeks. 【注】简单写一下为什么
1.Dad,please open the door.It is locked (lock). [be locked锁着的] OK,I'm coming. 2.We all know that a storm is followed (follow) by a calm. [by用于被动语态。] 3.You know my hair is cut (cut) once every four weeks. [头发不会自己理,用被动语态:be cut(被理)]