It is acknowledged that ___ shortest distance between persons is ___ sincere smile..
Please make sure the light will _____ if no one is in the room.
It is a pity that the quarrel _____ their friendship.
---Will you walk a little faster? ---I was afraid you could not _____ .
Our teachers promised to attend our class meeting, but they haven’t ____ yet.
Your article will have to be _____ to fit into the magazine.