_______ in 1636, Harvard is one of the most famous universities in the United States.
I _______ my success to my family’s support.
It is _________ pleasant to take a crowded bus.
It is uncertain _______ side effect the medicine will bring about,although about two thousand patients have taken it.
Children who are not active or ______ diet is high in fat will gain weight quickly.
People were perhaps more honest a long time ago when life was very different from _________ it is today.