I have many friends, ________ some are businessmen.
One in five humans ___access to safe drinking water by 2080.
It is hard to imagine what I ___today if I hadn’t been admitted to Nankai Middle School 15 years ago.
Not until they left school ___how much their teachers loved them and helped them.
___three times in a row, the boxer decided to make a fourth attempt, though.
___is well known is that Africa had contacts with India and the Red Sea civilizations from the earliest times.