Services to be mentioned in st-3 return

A private limited company has taken service tax registration for 10 services which includes some services of reverse charge basis. Out of 10 it has provided only 2 services for a particular half-year. So Should it mention all services in its Half-year return ST-3, in which for 8 services it will show Zero values and for 2 services with respective values? OR It should only mention 2 services which it provided with their respective values??