Has all that without delay yet?A. can do…being doneB. done…been doneC. ought to be done

Has all that without delay yet?
A. can do…being done
B. done…been done
C. ought to be done…to do
D. should be done…been done

A. can do…being doneB. done…been doneC. ought to be done…to do(答案→)D. should be done…been done解析：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。

这下我知道了