甲、乙两种物质的溶解度曲线如右图所示，回答下列问题：
①每个同学都应该上课专心听讲的好习惯。
②平静的河面上，有一只小船迎着风浪向岸边驶来。
③多读好书，可以丰富和提高我们的知识。
——I hear you______ in a sports center. What's it like?——Well, it's very hard work and I'm always tired, but I don't mind.
