系统解析：When I was 8, my father took me and my brother on a picnic beside a river one day. When we arrived there, my father warned us the river was very dangerous and made us promise not to walk up to it. I did not keep my promise. I walked into the river, and I fell down because the river was very deep. I could not stand and touch the bottom. I cried out loudly, but nobody was there, except my brother. My father went to search for some wood for our picnic.
My brother was very scared and did not know what he could do because he was two years younger than me. He jumped in, but that just made the situation worse because he was even shorter than me and he could not swim. Both of us cried out. Fortunately, there was a farmer who passed by. He saved us before our father came back.
