英语题---缺词填空

wrong
careful
注：这是一个初二英语题,参考原文如下,
Swimming is very popular.People like swimming in summer because water makes people feel cool.If you like swimming and swim in a wrong place,it many not be safe（安全）.These years,a lot of people died when they were enjoying themselves in the water,and most of them were students.Some people are not careful in swimming.They often think they swim so well that nothing will happen to them in the river.Summer is here again.If you go swimming in summer,don’t forget that better swimmers have died in water.They died because they were not careful,not because they could not swim.So don’t get into the water when you are along.Don’t get into the water if there is a “No swimming” sign.If you remember these.Swimming will be safe.