根据下图判断下列说法正确的是（） A．若向大理石中加入足量的稀盐酸，则Y轴表示

Many teenagers have hobbies. But sometimes these hobbies can get in the way of schoolwork, and parents might worry about their child’s success at school. Teenagers often think they should be allowed to practice their hobbies as much as they want. Do you agree?
Liu Yu, a fifteen-year-old boy from Shandong, is a running star. He is on his school running team and has always wanted to be a professional athlete. 小题1:________________ “Of course we want to see Liu Yu achieve his dreams,” says Mr Liu, “and we know how much he loves running. That’s great, and my wife and I have watched him in every one of his races. 小题2:. ________________ But we do think that our son needs to be realistic. Now that he is getting older, he needs to think about what will happen小题3:. ________________.” Liu Yu doesn’t really agree. “Well, I think I should be allowed to make decisions for myself,” he says. “My parents have always taught me the importance of working hard and not just to do what I enjoy. I understand this. 小题4:. ________________ Being a professional runners is the only thing I have ever wanted to do.”
Mr and Mrs Liu believe that Liu Yu should study hard in the evenings, and so they don’t allow him to practice running on school nights. “I know this seems strict,” says Mrs Liu, “but we think we’re doing the right thing. He has to understand that very few people can become professional athletes. It’s very difficult dream to achieve. We don’t allow him to practice every day 小题5:________________”

A. if he doesn’t become a professional runner in the end. B. However, his parents won’t allow him to train as much as he would like to. C. But I’m serious about running. D. because we think he needs to spend time on his homework. E. We have nothing against running.