They won't be back home until the work ____ .A.was done B.will be_英语解答

They won't be back home until the work ____ .
A.was done B.will be done C.is done D.had been done
为什么选C,有什么规则吗?请详解,

人气：392 ℃　时间：2019-10-18 19:17:58

解答

【They 主语】【won't be back home谓语】【 until the work is done 时间状语】选C.句意：直到这项工作完成他们才会回家.原因：时态搭配原则——在时间、条件状语从句中,主句用一般将来时,从句要用一般现在时代...