问题补充:
—Excuse me, Mum. When can we have dinner?
—Not until it in half an hour.
A. is prepared
B. will be prepared
C. has been prepared
D. was prepared
答案:
(答案→)A. is prepared
B. will be prepared
C. has been prepared
D. was prepared
解析:句意:打扰了,妈妈,我们什么时候能吃饭?——再有半个小时就准备好了。结合语境可知下文描述的是可观的动作,故用一般现在时态。主语是动作对象,故用被动语态。选A。