We have done .(many) to protect the environment填一词

We have done .(many) to protect the environment填一词 we have done our and what have we done What Have We Done 歌词 We have many classes___saturday. Many people have realized that we won't have any more clean water to drink unless something _____ to fight against pollution.A.was done B.will be done C.to be done D.is done we have done much为什么用much We have many events at we have many dierent hobbies We have many new movies. we don't have done our homework 与 we have not done our homework的区别 We all have done与we have all done哪个对 为什么we have many books,要要填have What have we done today to make we fell proud 用汉语翻译“We cannot undo what we have done” I can forgive so many mistakes I have done . We have done thing we ought not to have done and___undone things we ought to have done.A.left B.leave C.will leave D.leaving We have done thing we ought not to have done and___undone things we ought to have done.A.left B.leaving.为什么是A,B为什么不可以