Research shows that smiling has many positive effects on our health. This might explain why the people in the studies with bigger smiles had longer lives. ________ It also lowers blood pressure.
AEndorphins not only make us feel better, but reduce pain as well.
BStudies show that smiling reduces stress and stress-related hormones.正確答案
CWe can even get the benefits of smiling just by making ourselves smile.
DIn other words, we smile because something happens that makes us happy.
答案與詳解
