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

I am staying __________home ________next week. [ ]

Why are you worried? — I’m expecting a call from my daughter. She _______ abroad for three days.

_____ of the apple ____ bad and he has to throw it away.

I’m sorry to keep you ______ for an hour. Now let’s begin our work.