Once harm ( )to the environment,it takes years to have the system recovered 括号里填什么,为什么A.does B.is done C.will be done D.be done

once harm is done to the environment,it takes years to have the system _A recoverB recoveringC recoveredD to recover Once harm is done to the environment,it takes years to have the system recovered.这是什么从句?哪是从句,哪是主句? Drinking polluted _water the healthA do harm to B does harm to C is harmful for B does harm to Once harm ( )to the environment,it takes years to have the system recovered 括号里填什么,为什么A.does B.is done C.will be done D.be done great harm.So the local government should take measures to Lead can do harm to the brains of growing children. waste gas is _____(harm) to the environment Once harm is _______ to the eco-system,all species will ________,including man himself.A.made; be in danger B.done; be dangerous C.caused; be endangered D.done; be in danger the result shows that the bad habit will do harm to our healthit_____ ______ ______the bad habit will do harm to our health Too much exposure to TV programs will do great harm to the eyesight of children.翻译 The robot b______ to work ay once. once we start tey to be the Nuclear science should be developed to benefit the human beings rather than（ ）them.填harm还是to harm?还是都可以?为什么 do harm for 和do harm to 区别 do harm to 与do harm for的区别 求英语辩论稿part-time job do more good than harm to the university student3Q part time job do more harm than good to the university student反方观点 翻译一下where it occurs this kind of disease can cause great harm to the battle.