We can’t liveair or water.[ ]

___is well known is that Africa had contacts with India and the Red Sea civilizations from the earliest times．

After Steven sent some e-mails ,he______ surfing the Internet.

Nanyang has changed a lot in the past five years. —Yes. You can see lots of new buildings ,flowers and trees on ___side of the street.

He plays tennis _____ a tennis racket _____the tennis court.[ ]