Question

Has all that ____ without delay ____ yet?

1. A.
   can do…being done
2. B.
   done…been done
3. C.
   ought to be done…to do
4. D.
   should be done…been done

Answer 1

D
选D。that should be done without delay是定语从句。其中that在从句中作主语。而将本句还原后主句为All has been done。