My grandparents asked me to go and see them whenever______.

—What a beautiful day!— Yes， it's ________ that I'd like to take a walk.

When he was a student, he would get up early and work late into night, believing “______________” 

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

 I didn’t manage to do it _____ you had explained how.