Ⅰ.单词拼写
1．There is a large population ________(移动)of the old to Florida in the USA.
2．After their ________(退休)，the old often choose to move to warmer places in the USA.
3．He used to work as an ________(会计)in that factory.
4．I was walking in the street when an ________(救护车)whistled past me.
