It will not be ________ we can meet again

Were you at home at 7:00 yesterday evening I called you but no one was there. —Sorry, we ___________ a movie at the theatre at that time.

The famous scientist was ____a prize for his contribution toscientific technology.[ ]

You must keep the door _______ when you leave your room. — But I want to get the fresh air. I think I can keep the window ________ instead.

The twins were so much alike; I could hardly ________ Tom.