little has been done that is helpful to our work其中的 that能换成all that 么?为什么?

Little has been done的翻译 ------work has been done,has it?A.few B.a few C.little D.a little Little has been done that is helpful to our work.的翻译 can be done has been Everything that can be done has been done 中can be done has been done has been doing have been done区别 has been done,had been done 的区别是什么? little has been done that is helpful to our work其中的 that能换成which么 little has been done that is helpful to our work其中的 that能换成all that 么?为什么? 4.Little has been done is helpful to our work.A.that B.what C.which D.all that. ( )has been done to prevent the water in the lake from being pollutedA,little B,few C,other D,many what done has been done has been done?在说说他的结构是什么时态? it has been done 谓语it has been done 这句话done作表语还是been done做谓语? has been done 和has been 区别是什么 Has all_can be done Awhat,done Bthat,been done Cthat,be done Dwhat,already done A lot of things ____ by people to save the little girl now.A.are doing B.are being done C.has been done D.will be do have/has been+done 是什么时? has been done和wasdone的区别 no harm has been done翻译