12 ( ) 1 The plane is flying _____. A. in the sky B. in. the air C. in space D. in sky ( ) 2 There is a sweet smell___. A. in the air B. in the open air C. in the sky D. in the space ( ) 3 We held an interesting party___. A. in the air B. in the sky C. in the open air D. in space ( ) 4 Seen from___, the earth appears to be a big blue ball. A. the space B. space C. a space D. this space