Usar "be unoccupied" en una oración

1. For a place he had believed to be unoccupied, the region was

2. racquetball room which seemed to be unoccupied

3. In considering these several means of distribution, it should be remembered that when a pond or stream is first formed, for instance on a rising islet, it will be unoccupied; and a single seed or egg will have a good chance of succeeding