On Sundays there were a lot of children playing in the park, ________ parents seated together joking.
His camera is more expensive than ___.
There is no such ___ person in the world.
According to a UN report, a third of the world population have no ______ to clean drinking water and health care.
-- Why do you look sad?--There are so many problems _____.
I _____ him not to smoke, but he didn’t think it necessary.