1. (2021九上·中山期中) 完形填空

A man and his friend were walking through the desert(沙漠). During the trip they had a1, and the man hit his friend in the face. His friend was hurt, but without saying 2, he wrote in the sand," Today my best friend hit me in the face."

They3on walking until they found a lake, where they decided to take a bath. The man's friend fell into the lake and was in danger, but the man saved him. After he came back to life, he wrote on a4:"Today my best friend saved my life. "

The man who had hit and5his best friend asked, "6 l hurt you, you wrote in the sand and now, you wrote on a stone. Why?" His friend7, "When someone hurts us, we should write it down in sand where wind can8it away, 9, when someone does something good for us, we must write it down in stone where it can10forever."