Swimming is very popular in summer. People like swimming in summer because water 小题1:m______ people feel cool. If you like swimming and swim in a wrong place, it may not be safe(安全的). Last summer, more than ten people died 小题2:w______ they were 小题3:e_______ themselves in the water, and 小题4:m______ of them were students. But some people are 小题5:s_____ not careful in swimming. They often think they swim so well that小题6:n_____ can happen to them in water. Summer is here again , if you go swimming in summer, don’t forget that better swimmers have died in 小题7:w______. They 小题8:d______ only because they were not 小题9:c______, not because they could not swim. So don’t get into water when you go swimming 小题10:y______, go with your teachers or your parents. If there are “No 小题11:S______” sign, don’t get into water, either. If you 小题12:r______ these, swimming will be safer.