题目

10. 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 答案：D 解析: 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。

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