问题描述：
swimming is very popular（受欢迎的） in summer（夏天）.People like s____ in summer because water
Simming is very popular（受欢迎的） in summer（夏天）.People like s____ in summer because water makes them feel cool.If you swim in a wrong place,it may not be s____.Some people die （死）when they are swimming in a w____place.Most of them are students.But some people are still not c____ in swimming.They often think n____can happen（发生）to them in winter.S____is here again.If you go swimming in summer,don't f____that good swimmers often die in water.They die b____they are not careful,not because they can't s____.So don't get into water when you are alone（独自的）.If there is a "No swimming"sign（标牌）,don't get into water.If you remember t____,swimming will be safer.
（填横线"_____"里的) 急
Simming is very popular（受欢迎的） in summer（夏天）.People like s____ in summer because water makes them feel cool.If you swim in a wrong place,it may not be s____.Some people die （死）when they are swimming in a w____place.Most of them are students.But some people are still not c____ in swimming.They often think n____can happen（发生）to them in winter.S____is here again.If you go swimming in summer,don't f____that good swimmers often die in water.They die b____they are not careful,not because they can't s____.So don't get into water when you are alone（独自的）.If there is a "No swimming"sign（标牌）,don't get into water.If you remember t____,swimming will be safer.
（填横线"_____"里的) 急
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