It is five years since we began to enjoy a ________ spring holiday each year．

1. A.
   ten-day
2. B.
   ten day
3. C.
   ten day’s
4. D.
   ten-days

It is five years since we began to enjoy a ______ spring holiday each year．

A．ten-day          B．ten day             C．ten day’s          D．ten-days