in the sky or in the air?1 The plane is flying _____.A.in the sky B.in.the air C.in space D.in sky此题答案为A,但为什么不选择B呢?in the sky 和 in the air都有在天空的意思,为什么只可以选择in the sky呢?

fly in the sky up in the sky living in the sky HopeHope,In the sky. Hope,In the sky. 英语翻译In to the sky,to win or die_ The m_______is in the sky. The fire in the SKY... The fire in the SKY... Blood In The Sky 歌词 Up In The Sky 歌词 Eye In The Sky 歌词 Eyes in the Sky 歌词 the sky in my eyes Stars In The Sky 歌词 waking in the sky 这首歌 walking in the sky歌词 Walking in the Sky 歌词