How to Use "questionable" with Example Sentences

1. Still , they cited a number of instances of questionable accounting .
2. That now looks like a highly questionable assumption .
3. Bear was a major promoter of the most questionable subprime lenders .
4. A report by abc on toyota has gained wide attention but also appears questionable .
5. That way , the browser kernel-which interacts directly with the operating system-is shielded from anything questionable lurking outside .