It is terrible if a plane ( ) when flying in the sky

It is terrible if a plane ( ) when flying in the sky The plane is flying in the sky. Taking a plane is like a bird [flying]in the sky正确形式填空 -------------is“a flying ball in the sky” is,in,plane,the,there,sky,a The plane is flying high in the sky 是什么结构,是S+V+OC么 The plane is flying above the roofs of the sky 这个英语句子是对的吗 we saw a plane was flying in the sky 1.It sounds( )a plane is flying overhead A.like B.as if 翻译：A bird is flying slowly by the black clouds in the sky . 这两句话对吗?The plane is in the sky .Plane fly in the sky. Look!A bird ( ) in the sky.A.flies B.is flying C.fly D.flyin