Tony直到九点才打扫完卧室：Tony didn't __ __ the bedroom until nine o' clock.
问题描述：
Tony直到九点才打扫完卧室：Tony didn't __ __ the bedroom until nine o' clock.
答
Tony直到九点才打扫完卧室：
Tony didn't _finish_ _cleaning_ the bedroom until nine o' clock.
until的用法是：
not do sth until + 某时间
表示 直到某个时间才做了某事.
这句句子中就是直到9点才做完了打扫.