All that can be done___

主谓一致：（并说明原因）All that can be done___.A.has been done B.has do All that can be done___________ All that can be eaten( )eaten up all that can be done been done. all that can be eaten_____eaten up All that can be done _______(be)done 美国陆军征募标语be all that you can be是什么意思 all that can be eaten had been eaten up. all that can be done has been done Has all that can be done been done? all that can be done has been done. be all you can