500
Name two things that have happened since Curtis has been at his job.
What is any of the following:
children have grown up,
Some have had children of their own,
Some have had grandchildren,
Children have had dogs,
Dogs have had puppies,
Cats have had kittens,
Trees have gone from little to big,
Houses have been torn down,
Houses have gone up,
People have moved out,
People have moved in.