--I’m afraid I’ll come back in an hour.-- There is no need to rush back. Just _________ .
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.