He doesn’t do his homework______ , though he has  ____.

Who do you think is the greatest man _______?

It is ______ to spend money in preventing illnesses by promoting healthy living rather than spending it trying to make people ______ after they are ill.

The criminal, as well as some ______ people, was arrested by the police yesterday.

As there is less and less coal and oil, scientists are exploring new ways of making use of ____ energy, such as sunlight, wind and water for power and fuel.