should be done在此选择题中的如何解释?

should be done在此选择题中的如何解释? can't be done.should be done.should have done should have done中的have done 是什么? 请问shouldn't have done和might not have done 在此题中的区别? 在all that should be done has been done用了has,但在all that shoul be supposed to 和should have done something should be done to do对吗 all the things should be done have been done already 十万火急what should be done have benn done should have done 和should be doing 有区别吗 where在此句中的解释 In order to be a man ,what should be done