1 is very popular in 2 .People 3 swimming in summer 4 water makes them feel(感觉) 5 . 6 it is kind of dangerous.Last year more than ten people lost their lives(生命) 7 they were swimming.If you want 8 , don’t get into water when you are alone(单独的,独自的).You’d better(你最好)go 9 your parents 10 your friends, and swim in a safer(较安全的)place.