问题补充:
“When did he leave the classroom?” “He left you turned back to write on the blackboard.”
A. the time
B. the moment
C. until
D. since
答案:
A. the time
(答案→)B. the moment
C. until
D. since
解析:the moment 用作连词,意为“一……就……”,相当于 as soon as。类似地,the minute, the instant 也可用作连词,表示“一……就……”的意思。