Grass which has been cut and

Grass which has been cut and Grass which has been cut and dried .中的which去掉与不去掉有何区别? Grass which has been cut and dried .which去与不去在意思,语气有何区别?引导从句主要起什么作用 Which photo has been taken? A assette tape which has not been A cassette tape which has not been played.的中文翻译 a stolen car=a car which has been stolen? it's one of the most important meetings____this yearA that has been heldB which has been heldC that have been heldD which have held The house__I used to live has been knocked down.用which 还是in which Mr green______Canada since 1990.A.has come toB.has gone toC.has been toD.has lived inchoose which one ,why? which 后面为什么还用has been 这个时态,我认为应该用过去完成时A new machine called 'The Revealer' has been invented and it has been used to detect gold which has been buried in the ground. 运行 pr 时出现 a buffer overrun has been detected which has corrupted the pr 'my english has been improved' or 'my english has improved',which is correct? The final examination will cover all__taught this term.A.what has been B.that has been C.that was D .which has been has been 英语定于从句选择,谢谢~~~~!This is the only one of the novels published recently________translated in English.A.that has ever been B.that have ever been C.which has never been D.which has ever been The reason _it has been raining for 5 days is _ the crops has been flooded.A.that;whyB.why;thatC.which;whyD.why;which为啥 The house the windows of which were damaged has now been mended.The house of which the windows were damaged has now been mended.这两句有何不同?