Do you know when the plane ()?

Do you know when the plane ()? Do you know when the plane takes off?为什么不用将来时when the plane Do you know when their plane leave Beijing?改错 Do you know _______ the plane takes off? Do you know when the Greens will Do you know when the world_______? Do you know ( ) a new model plane? what will you do when you ______(know) the way Do you know when the train to leave?与Do you know the train w Do you know what time the plane ______(leave)Hong Kong? Do you know when (meet) A:When was the telephone invented,do you know?