30.This machine,______for many years,is still working perfectly.A.after which I have looked B.which I have looked after C.that I have looked after D.I have looked after 为什么用B不用D?我是想问 这里的which是否是做从句的宾语 这

Do you knoe how to use this machine?同义句Do you know the ___ ____ use this machine? This machine is unavailable. This kind of machine is used ____ metals.A.to cutting B.for cut C.for cutting D.cut ____(experiment) on several times ,this new type of machine will be put into mass production.在线等 this machine ____ specially ____to using underwater A.has been :adapted B.has been :adaptingthis machine ____ specially ____to using underwater A.has been :adapted B.has been :adapting C.was :adapting D.has:adapted This kind of machine can p_______ music. This machine is very easy to This machine is very easy to the machine has been recovered this Machine Machine Machine Don't touch the machine,____ ____?(完成反义疑问句) This is a very expensive machine同义句转换This is( ) ( ) ( ）machine This is ____ ____ ____ 谁能做一下这个英语填空?Edison began to make a talking machine in 1877.At first he used paper ____ holes yo make a sound.He worked ____ months on this idea,at he found ____ record a person is voice.But the first machine was very simple and He ordered a washing machine by phone yesterday,and _____ machine will arrive this afternoon. you have not read the ____ for the machine yet?