She was so angry that she began to shout.

本题考查的是对形容词的认知。这句话的意思是：她很生气，以至于大吼了起来。angry的意思是生气的。选项A unhappy不悦。选项B furious狂怒，极度愤怒，例如： He is furious at being kept in the dark．他因为被瞒着而大发雷霆。选项C upset心烦的，苦恼的，例如：He was horribly upset over her illness．他为她的病感到忧心忡忡。选项D depressed沮丧的，消沉的，忧郁的。angry和furious意思最接近，所以选B。