Middle and high school students would be asked to do 50 hours of community service work a year.

An hour or so working at 150 feet is hard work.

I've spent the past hour and a half working on it.

Some workers said they were often not paid for hours worked.

They spent long hours working, and at last it was real work.

He spent a half hour working on a letter home.

It's been a long day - I spent hours working on a new program.

Do you also not realize the hours worked by most teachers for that £22,000?

I also could wear them for long hours working at the computer.

After the morning dance class, the students spent two hours working on a group video project.