Keep the machine _______,and you will know how it works.套用了什么用法?是to run 还是 running

The machine ___(invent) many years ago. we should keep the air ___ ___ ___ (清新) We must ___(keep) the classroom clean. 这台机器是用来干什么的?英语翻译What is the machine ___ ___? Do you knoe how to use this machine?同义句Do you know the ___ ____ use this machine? I have no idea how I can operate the new machine.I have no idea ___ ___ operate the new machine. the doctor told us ___(keep) the dog warm They use the machine to keep the room cool(在线等候)急!改为被动语态They use the machine to keep the room cool____________________________________________He give me a dictionary____________________________________we should make a telephone I'm learning the ____ of running the machine.I'm learning the ___ of running the machine.A.skill B.power C.language D.news Is the washing machine I have been used to worth ___(fix) the old machine ____ the room wet a used to keep b was used keep c ussed to keeping dwas used The boy failed ___ (keep) his room clean and tidy. you'd better ___(keep) the room nice and clean. We should keep the baby ___(save)from danger. Keep the machine _______,and you will know how it works.套用了什么用法?是to run 还是 running Please keep quiet in the reading room.(改为反义疑问句)Please keep quiet in the reading room,___ ___? Attention,coffee lovers!We have for you,the best coffee machine ___ invented.Attention,coffee lovers!We have for you,the best coffee machine __ever_ invented.翻译 THE TIME MACHINE怎么样