______ a year do people in the USA celebrate Halloween– Once a year. I would like to dress up _______ an old woman.

－Who are you waiting for－___________us a lecture this afternoon.

There are _________ floors in the building and my home is on the _________ floor.

Some people care much about their appearance and always ask if they look fine in ______ they are wearing.

The photo _____ taken by my brother last week is very nice.