问题补充:
–Will the twins go to Tom’s birthday party next Sunday?
--Not until they .
A. will invite
B. invite
C. will be invited
D. are invited
答案:
A. will invite
B. invite
C. will be invited
(答案→)D. are invited
解析:not 、、、until表示直到、、、才,引导的是条件状语从句,在条件状语从句中,如果主句为一般将来时,从句要用一般现在时代替将来时。故本题用一般现在时的被动语态,故选D