Much___to fight against pollution.A.have been done B,has bee

much has/many have been done to stop the pollution.请说明选A原因 21.Much (B) to fight against pollution. What ____ with the clothes?A.has been done B.has done C.have We _____ fight against pollution.A.may B.Should C.mustn’t D. 题目是“FIGHT AGAINST POLLUTION” i have much___to do.A.work B.exercise Your homework today hasnt been done,__?A.have you B.has it C 非谓语动词用法to have done/having done/to have been done/having bee has been doing have been done区别 have/has been+done 是什么时? 定语从句练习All___should be done has been done. A.what B.which C.t All__can be done has been done.A.that B.who C.wh