Not believing their eyes, the visitors on the spot _______ the flying plane, doing some most difficult and dangerous tricks in the sky.
The president spoke at the business meeting for nearly an hour without _________ his notes.
---We’ll have a math exam this afternoon. ---_________.
---What is she afraid of? ---______in public.
Let’s visit the National Museum this weekend, _______?
---_______ fine day! Shall we go out for a walk? ---That sounds great!