Once upon a time there was a wolf in sheep's clothing ,hiding __among a flock of sheep .为什么填himself而不填itself

Once upon a time once upon a time once upon a time Once upon the time 是什么意思 once upon a time中文 .英译中..once upon a time..) Your Love (Once Upon A Time In The West) 歌词 西部往事 ONCE UPON A TIME IN THE WEST怎么样 once upon a time ,an angel in the sky 英语翻译用once upon a time once upon a time 课文翻译 京城往事 ONCE UPON A TIME怎么样 once upon a time的意思 Once upon a time怎么读 You are my once upon a time . once upon a time the animalsof the forest came together to see who was the most beautiful.这句话怎么翻译?once upon a time什么意思? 【Once upon a time】这首歌歌词是Once upon a time when the sky was covered with blue　　是谁唱的 完形Once upon a time,there was a river The river lived alone