keys are used for ____(锁) the door如题

keys are used for ____(锁) the door如题 Keys are used by people （for/with/to opening) the door.哪个对? Keys ( ) opening the lock in the door.Keys ( ) opening the lock in the door.A.used for B.are used C.are used to D.are used for我选的是C老师给大答案是D be used to doing不是被用来做某是吗,我查词典查不到be used for? what are these keys ( for 还是to This house is used for __ (出租) I think my keys are on the desk.改为否定句 I __ __ myI think my keys are on the desk.改为否定句I __ __ my keys are on the desk. We __ in this pond when we were young,but now it ___ fish.A.are used to swim,used to keepB.are used to swimming,is used to keepC.used to swim,is used for keepingD.used to swim,used to keep what are the shoes used for The pot is used for __(keep)water hot Where are () (they )keys Whose keys are these? trees_______furniturea.are used to making b.used to make c.get used to d.are used for making keys are user by people （for/with/to doing) the door哪个对? 一、根据首字母填空what are you doing?i'm l_____ for my keys 用介词in,ar,of,for填空There are some keys _ the case the keys on the board for typing are badly broken是什么意思 英语翻译是what are they used to do 和what are they used for doing? The rain will come soon.__ __ __ __ __ the rain comes.They are getting ready for their trip now.The are __ __ their trip now.