Swimming is very popular in summer. People like swimming in summer because water makes them_________cool. If you like swimming but swim in a ________place, it may not be safe. These years, more than ten people ________while they were enjoying themselves in the water and ________of them were students. But some people are ________not careful in swimming. They often think they swim so ________that nothing can happen to them in water. Summer is here again. If you go swimming in summer, don’t forget ________better swimmers have died in water. They died because they were not careful, not because they ________swim. So don’t get into water when you are alone. ________there is a “No Swimming” sign, don’t get into water, ________. If you remember these, swimming will be safer.