Reading comprehension
When I was a boy I belonged to the Boy Scouts so I used to go camping every summer and once something happened which I have never been able to explain．
We were camping in a place above a river．After arriving we all rushed down to the river and had a swim．Standing by the river we noticed that it was surrounded(环绕)by cliffs(悬崖)．If someone wanted to reach the river at this point he had to walk past our camp．
Several days later the scoutmaster had to be away for a day．That afternoon we had supper early．We were sitting round the fire eating and talking when a man walked past and went down towards the river．We all felt that this man looked very strange but because each of us was afraid of looking very stupid no one said anything．
We ate rather slowly taking as long as possible．After finishing we collected our plates together so that we could take them to the river where we always washed them．But no one moved towards the river梬e stood looking at each other ashamed．Then all shouting at once we began talking about the man who had walked past us．We agreed how strange he looked and we wondered what he could be doing by the river．We knew that he could only return by passing through our camp．
An hour passed．Then one of the boys suggested we should creep(悄悄移动)down by the river so that we could see what the man was doing．Moving very slowly and keeping in the shadow we crept down towards the bank．One boy climbed a tree so that he could see everything clearly．He called to us that there was no one there so we ran down to the bank looking everywhere carefully．We could not understand where the man had gone．
When it got dark we went back to our camp feeling bewildered．We told the scoutmaster what had happened in the evening．Smiling he doubted that we had seen the man but finally suggested we go and look again．We did but there was no one there．
Many years have passed but I still remember it as if it were yesterday．What did we see? I do not know．