This is the room in which he used to live.和This is the room which he used to live in这两句中介词的位置是不是放在句末和关系代词前面都可以,如果不是的话请说明一下用法,谢谢

the living room is larger than any other room in the flat (保持原句的意思)the living room is ---- ---- ---- ----rooms in this flat This room is the biggest in my house.(改为同义句)This room is the biggest in my house.(改为同义句)This room is_ _ _ _ room in my house. The boy is in---------room this is my room ,that is the ___(twin) room Is there a picture in your room ?--- Yes, look ! this is ____picture A.the B.a this is a beautiful ___(paint) on the wall in the room 修改病句：would you mind opening the gate?The air in this room is vary close. 初中英语改句子This is the room.Lei Fang once lived in the room.This is the room___ ____Lei Fang once lived. this room is the biggest in my house改为同义句this room is ,,,,,in my house (中间5个空格) This room is the biggest in my house（改为同义句） This room is（）（）（）（）rooms in my house 填空this is a room the hotel This is the room where Lu Xun once lived 这句话可不可以用This is the room where Lu Xun once lived in为什么? This is the ___(twin)room.they are often study in it This room is （ ）（一样大小）the one I once lived in.（same） Is the table in this room big or small?答句每种打法一一列举 (This desk) is in the room.对括号（ ）里的部分提问 This is the room in——LU Xun lived（用关系代词填空） This is (a table) in the room.(括号部分提问）