How to Use "unanswered" with Example Sentences

1. Many other basic questions about ice also remain unanswered .
2. Several awkward questions are left unanswered by this study .
3. The key question remains unanswered : who funded it ?
4. This new evidence leaves economists with lots of unanswered questions .
5. Calls to a spokesman for the chinese basketball association went unanswered friday .