You can certainly leave the classroom as soon as your homework.A. has doneB. has been don

问题补充：

You can certainly leave the classroom as soon as your homework.

A. has done

B. has been done

C. will be done

D. will have been done

答案：

A. has done

(答案→)B. has been done

C. will be done

D. will have been done

解析：在时间状语从句中可以用现在完成时表示将来，强调从句的动作发生在主句谓语所表示动作之前。