Tìm lỗi sai và chữa lỗi

It is imfortand to keep our body health
you yawn because your lung need more oxygen
people who smiles more are happier , and they live longer
do you lnow that orange offer more health benefits than vitamin c pills ?
we had waited since a while at the clinic before I got to see the doctor
tìm lỗi và chữa lỗi