Tom was about to close the window his attention was caught by a bird.
------Why do you turn back?------ Oh, the bridge ahead_______.
People in the west make_______ a rule to buy Christmas presents for their relatives and friends.
I remember everything ______it had happened yesterday.
It is required that students______ mobile phones at school, so seldom_______ them using one.
------Tom is never late for work. Why is he absent today?------ Something _______ to him.