The _________ dog ran away when it saw the _________ wolf coming forward.

问题描述:

The _________ dog ran away when it saw the _________ wolf coming forward.
A.frightening; frightened\x05B.frightening; frightening
C.frightened; frightened\x05D.frightened; frightening

狗害怕,是被动害怕,所以用frightened,而狼是吓人的,所以用主动形式frightening