--.—Excuseme,Mum.Whencanwehavedinner?—Notuntilit
来源：语文精选馆 1.9W
问题详情：
-- . —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
【回答】
A
知识点：动词时态
题型：选择题
