根据以下材料，回答40-43题
Tom was aged four but he was talkinglike a two-year-old baby. He was saying such things as"kick ball" and"want car", and using lots of one-word sentences. He should have beensaying some really long sentences and telling stories with them. He wasn't.Something had gone terribly wrong.
Quite a few children have what is called a"language delay". For some reason they don't learn to speak asquickly as they should. Their friends shoot ahead and they're left behind. As aresult, they get very lonely. Nobody wants to talk to you if you can't talkback.
Can anything be done to help thesechildren Yes. They can go to see a speech therapist--a person who's speciallytrained to work out what's wrong and who knows how to teach language tochildren. This is what happened to Tom. The speech therapist played some gameswith him and heard how he talked.She made a recording of his speech,and chatted to his morn and dad about his background. They'd taken Tomto see a doctor, but the doctor hadn't found anything wrong with him.
He seemed perfectly normal in everyway--except he just wasn't talking.
After Tom and his parents had gone home,the therapist listened carefully to the recording she'd made. Then she lookedat a chart which showed how language developed in children aged two, three,andfour. She could see Tom was a long way behind.
The next step, she decided, was to teachTom how to say some new sentences like "kick a red ball, " and"the clown is kicking a ball. " Tom didn't get the new sentencesright straight away. But the therapist was very patient, and after a few morevisits he started to make some progress.
What is the best title for the passage
文章开头通过汤姆的故事，提出相当多的儿童都表现出了语言迟缓的症状，随后提到言语治疗师可以缓解这种症状，接下来讲言语治疗师为缓解这个症状所做的努力，所以整篇文章围绕的中心就是“对于语言迟缓的孩子，我们能做些什么”。B项符合题意，故选B。
