--How was your weekend, Rose?--Awful! This was the first time I ________ alone at home, bored to death.

—I don’t like this kind of music.—_______. It’s too noisy.

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

It was quite a long time ________ I made it out what had happened.

_______ his return from America, he got down to his research.