Pioneers

The pioneers met with many dangers.

The pioneers have overcome a series of obstacles.

In early days pioneers lived in houses made of mud and straw.

They were pioneers of space flight.

Many of our pioneers are still alive... but, alas, many of them aren't alive any more.

My ancestors were the pioneers of this land.

They were pioneers in the investigation of cancer.

We are the pioneers of this new branch of science.

The pioneers overcame a set of obstacles.

The pioneers dug some wells so that they would have water.