Dr. White has rich _________ in dealing with the children who have had bad _________.
----- Did you visit her while you _____ in New York? ----- I _____ to, but I was extremely busy.
John, look at the time. __________you play the piano at such a late hour?
The new laws___________reducing the heavy traffic have come into___________.
Water,________seems so simple and common, is___________makes life_________.
______as animals, the children came on the stage and started to perform.