My name is Frank White. I'm fifteen years old. I was born  on May 13th, 1996. Mike is my good friend. His birthday is on May 15th. He is only 13 years old now. Every year on May 14th, we have a birthday party together in our school. We often have a pop concert  . I play the guitar. He plays the drum. Many friends come to our party. We are very happy. Mike is   _   years old.
13 14 15 16