Hasallthat

问题详情：

 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

【回答】

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。

知识点：虚拟语气与情态动词

题型：选择题