Usa "testing ground" in una frase

1. The communal system does not work, but its ghost still howls about injustice, promises change, and seeks a new testing ground

2. You don't use it much so I think it would be a good testing ground

3. "His family was his testing ground for his obsessions, his controlling

4. We are here because this is a testing ground to show God whether

5. The first Iraq war was a military showcase… like an auto showcase, where people gawk at the latest technology, a testing ground to be used in improving their weapons of mass destruction for future wars