Hardly when we were told to stop.
A. did we begin
B. had we begun
C. were we beginning
D. were we to begin
网友回答
A. did we begin
(答案→)B. had we begun
C. were we beginning
D. were we to begin
解析：考查倒装句，hardly+had sb done when….,一…就….,句意是：我们一开始，就被告知停下。选B。