题目内容：

含有动物的英语谚语
let the cat out of the bag
as quiet as a mouse
raining cats and dogs
wolf in sheep’s clothing
ugly duching has grown into a swan

优质解答

let the cat out of the bag 泄露秘密
as quiet as a mouse非常安静；不声不响
raining cats and dogs 大雨倾盆
wolf in sheep s clothing：伪装友善的敌人；披着羊皮的豺狼
The ugly duckling has grown into a swan：女大十八变
是duckling,不是 duching