They will not start the work their teacher es back.
A. while
B. until
C. as soon as
D. if
网友回答
A. while
(答案→)B. until
C. as soon as
D. if
解析:本题考查连词的使用。本题的含义为直到他们的老师回来,他们才开始工作。本题中的not……until表示直到……才……的含义,与题意相符,而while表示当……时候的含义,as soon as表示一……就……的含义,,if表示条件如果的含义或引导宾语从句表示是否的含义,与题意不符,故本题只能选B。