Smiling is clearly good for us. ________ It is easy to see that smiling is much more than just an expression of happiness. It's a powerful tool for maintaining both emotional and physical health.
AEndorphins not only make us feel better, but reduce pain as well.
BStudies show that smiling reduces stress and stress-related hormones.
CWe can even get the benefits of smiling just by making ourselves smile.正確答案
DIn other words, we smile because something happens that makes us happy.
答案與詳解
