短文改错（共10小题；每小题1分，满分10分） Yesterday afternoon I went to Yuexiu Park. It happens that I saw         76．_____________ a touched event. At that time, some people were boating on the lake.              77．_____________ Among whom was a happy family. They were taking photos                   78．_____________ while suddenly the girl fell off the boat into the water. She was                      79．_____________ struggling but her parents cried out, “Help! Help!” It was                       80．_____________ obviously that they could not swim at all. From nearby a young man        81．_____________ immediately rushed to the lake. Without taking off his clothes, he jumped into water and quickly swam towards the girl, who was already   82．_____________ tired out. At last he carried her to the lake bank. She was saved!                     83．_____________ How happy the parent were! Before they thought                                84．_____________ thanking the young man, he had disappeared.                         85．_____________