He looks younger ______ his friend; in fact, he is three years senior _______ his friend.
If you offer him some help this time, since he once helped you, that would be ____.
If ________ guests we have, we would need ___ food.
The problem with people in Africa ____that the more is given and the more ______.
The reason ___ he is absent is ___he has a bad cold.
_______ people died ______ starvation that year will never happen.