Activists are working hard to ensure that environmental issues are high on the agenda at the international summit in June.
The school has been working hard to alert children to the dangers of talking to strangers.
He criticized us for not working hard enough.
Scientists around the world are working hard to try to find a cure for cancer.
David Suzuki is a well-known environmentalist who has been working hard to educate the people of this country about the dangers of pollution.
Johnny Carson once said, “My success just evolved from working hard at the business at hand each day.
Ray Inman once said that happiness, like an old friend, is inclined to drop in unexpectedly when you’re working hard on something else.
I’m tired of working hard every day while you lounge around doing nothing.
Cable companies are working hard these days to promote high-speed Internet access services.
The government of Niger is working hard to promote its oil potential to overseas investors.
The teachers are working hard to revise the curriculum to make it more up to date.
The government is working hard to stop racism and sexism in the workplace.
Your local police are working hard to clean up vice in this fair city of ours.
I prefer working hard to just sitting idle.
He owes his success both to working hard and to good luck.
He is working hard to support his family.
He is working hard so that he may pass the examination.
He is working hard to pass the examination.
He is working hard to catch up with the others.
He is working hard in order to pass the entrance examination.
She is working hard this semester.
I am not in the humor for working hard today.
We are working hard to make up for lost time.