people have devised ever more cunning tools to cope with work that is dangerous,1,work为什么不用复数形式?2,work后的that能不能用which代替?为什么?

英语翻译原句：People have devised ever more cunning tools to cope with dangerous work.请问“ever”在这句话中怎么翻译? people have devised ever more cunning tools to cope with work that is dangerous,1,work为什么不用复数形式?2,work后的that能不能用which代替?为什么? 英语翻译:nor have machines yet been devised that can even imitate the hands of the weaver. people have devised ever more cunning tools to cope with work that is dangerous,1,work为什么不用复数形式?2,work后的that能不能用which代替?为什么?3,conferring为什么双些r加ing?4,And if scientists have yet to create the mechanic 英语翻译the world's architectural structures have also been devised in relation to the objective limitations of materials. will people have robots different people have different( ) 英语翻译TPO3-1 Theworld’s architectural structures have also been devised in relation to theobjective limitations of materials.全世界的建筑建构被设计关于材料的物理限制性? why do people have pets? will people have robots? 是什么意思? Every people have five senses. Different people have different s_______. different people have different Idea different people have different_______(hobby) people will not have to people have always enjoyed laughing People have supper in their Should people have cosmetic surgery?