How did they come to school today?—Because of the rain they came to school onfoot _____ a bus.[ ]

_______ the smoke come out of the building, my first thought was to call the fire department as soon as possible.

He kept a little notebook, in which__________ the names and addresses of his friends.

Don’t eat ______sweet food, or you’ll be ______fat.

Teenagers like to _____ the photos of the stars in their bedroom.