求英语高手帮解答这篇改错 .
Yesterday afternoon I went to the Summer Palace. It was happened that I saw 1_____
a touched event. At that time, some people were boating on the lake. 2_____
Among them was a family of three .They were taking photo3_____
while the girl fell off the boat into the river. She was struggling4_____
and her parents cried out,"Help!Help!"That was obvious that they couldn't5_____
swim at all. From nearby, a young man immediately jumped into the water, 6_____
without taking off his clothes. He quickly swam towards girl, 7_____
that was already tired out. At last, he carried her to the bank.8_____
She was saved! How excited the parent were! They were too excited9_____
and grateful to the young man that they don't know what to say. 10_____