a seven-hour working day的用法和样例：
- Labour favours a seven hour day.
- Her working day is seven hours.
- We can knock off work after five, but back then, workers didn't have an eight hour working day.
- He averaged nine hours' work a day.
- An online survey of 2,057 employees by online compensation company Salary.com found about six in every 10 workers admit to wasting time at work with the average employee wasting 1.7 hours of a typical 8.5 hour working day.
- The unions are campaigning for a shorter working day.