How to Use "heck" with Example Sentences

1. Just what the heck are you doing ?
2. Heck , apple introduced the wireless airport back in 1999 .
3. Heck , plenty of americans can relate to a man who has wrestled with extra rolls .
4. Heck , maybe just staying away from church and having a martini is lifting their spirits !
5. In the 1960s , heck laid the groundwork for coupling between carbon atoms by using a catalyzer , or chemical to promote the process .