We can't play games before our homework____A is done B does C will be done

问题描述:

We can't play games before our homework____A is done B does C will be done

  直到我们的作业做完之前,我们都不能玩游戏.
  homework 被动词汇必须被做 故在A\C间选择
  结合句式语态,A:is done被做完的意思
  C:will be done 将要被做完
  顾一目了然选择A为正确答案.