阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。每个选项只能用一次。

Swimming is very popular in summer. People like swimming in the hot weather even in the other three seasons. 【小题1】 But if you swim in a dangerous place, 【小题2】

People may die（死亡）when they are having fun in the water. Last summer, a few students went to swim in the river near their school. 【小题3】 Some people are not careful when swimming. 【小题4】 and they may always be safe in water. If you want to go swimming. 【小题5】

A．They often think they can do it very well.

B．Most of them think that it is interesting.

C．you’d better go with your parents.

D．Unluckily（不幸地）, three of them lost their lives.

E．it may not be safe.