they have been used to remove arsenic from the sludge produced by gold mining operations翻译,produced

have been used Where have they been? They said the big box would _____as a cage for the rabbit.A.be used B.useC.have used D.have been usedC为什么不对,请解析, I have been used to it. We have been used to it sadly 英语翻译They are all used in financial analysis as measures of the effectiveness with which assets have been employed. they have been used to remove arsenic from the sludge produced by gold mining operations翻译,produced They have a____ been there 选择：Every possible means ( ) to prevent the air pollutionis used?are used?has been used?have been used? I　have　been　used　to　invisible mode,have been used to loneliness,also have been used to my life of living alone.翻译成中文 They have all been languages that were used by people in many different countries.请帮我分析一下该句的语法~ People have been used to _______ business cards with each other when they first meet.1 exchange 2 exchanging 3 change 4 changing I have lived here for three years.I( )eating rice A.used B.used to C.have been used to what have they been doing 是什么时态 What places have they been?怎么翻译? where have they been?是现在完成时吗? they have been in kate's for they have been the subject of debate