When did he invent the telephone?变被动语态
When did he invent the telephone?变被动语态
When did they invent the plane?改为被动语态.
When did they invent the personal computer.用被动语态改写
When did he clean the window?怎样改为被动语态
He opened the door.变被动语态
Did you write the letter?变被动语态是什么?
when did they invent the personal comp
Did he clean the blackboard just now?的被动语态
The telephone was rang 是被动语态?
He invited me to the party 变被动语态
when did play 为什么是被动语态
把下列主动语态改为被动语态:when did they build the house?hav