Whether you are someone who smiles a lot（1） ____ not， there is always room for improvement． Research（2） ____ （show） that when someone smiles， a number of feel-good neurotransmitters are released（释放）in the body and these are linked with lower heart rate， lower blood pressure， better sleep and（3） ____ （little） stress． It would appear that （4） ____ physical act of smiling makes our brain think we are happy - even if we are not and just like that， it brings about a physiological response that makes（5） ____ （we） feel better and more relaxed． I think we have experienced how infectious a smile can be and we （6） ____ （attract） by the energy of shiny happy people laughing． So while I appreciate there is not always something to smile about， I think that being able to smile at ourselves is a quality worth （7） ____ （develop）． Even an internal smile or a case of faking it until you make it is most（8） ____ （definite） a good investment to develop a sense of （9） ____ （satisfy） from within． My new thing for the next month or so is to try and smile more often．Why don't you try that too and let me know（10） ____ you get on？