— Just now Jenny gave ten dollars to a person in trouble.  

— She _________ others. [ ]

A. was always helping                   

B. is always helping    

C. always helped                       

D. had always helped

如图所示，将开关（控制两只灯泡，且灯泡正常发光、螺口灯泡、三孔插座正确接入家庭电路中．