Choose A, AN or THE to complete each sentence

1.The teacher read _____ interesting article from the newspaper.
A AN THE No article

2.Julie talked for _____ hour about her school projec
A AN THE No article

3.Danny wanted _____ new bicycle for Christmas
A AN THE No article

4.All pupils must obey _____ rules
A AN THE No article

5.The Mississippi river is in _____ United States of America
No article AN THE A