British pupils have swimming classes at school. What is the swimming class like? In swimming class, we register first. We write down our names on a paper. We get swimming kits（游泳装备）.Next, we get changed（换好泳衣）. We find our swimming groups. There is a frog group, a dolphin group and a shark group. Some of my classmates don’t swim very well. They are in the frog group. Some of my classmates swim well. They are in the shark or the dolphin group. I'm in the shark group. We have two coaches. They teach different groups. We learn to hold our breath（屏住呼吸）and swim. It's a piece of cake for me! At the end of class, our coaches also lead（带领）us to play games in the water. It is really fun!
2.What's...like?“...是什么样的？”举个例子：What's your country like?“你的国家是怎样的呢？”
3.register“注册，登记”，举个例子：It's tony's duty to register our name every day.“每天登记我们的名字是托尼的职责。”
4.change是“变化，更换”的意思。比如：She changed her clothes quickly.“她迅速地更换了衣服。”
5.different解释为“不同的”。比如：Different students have different ways of learning.“不同学生有不同的学习方式。”
6.a piece of cake在这里可不是指“一块蛋糕”噢，这是个固定搭配，指“小菜一碟，很简单。”