Tired, Jim was fast asleep with his back ____ a big tree.
The policeman asked ________ with the old women.
21st Century is ______ a newspaper; it helps us know a lot about the world.
Rather than_____ on a crowded bus , he always prefers______ a bicycle.
My plane at 8:30 am, so Ihome at 8:00 tomorrow morning.
The number of people present at the meeting ________ about 1000, a large number of whom ________ experts from abroad.