It was a case of emergency．The four-year-old girl awoke and smel

It was a case of emergency．The four-year-old girl awoke and smelled smoke．She couldn't wake her mother,so she dialed"zero",An operator immediately called the fire department．Help was sent,and a tragedy avoided. Days before this emergency,the mother had taught her child how to telephone for help．Children as young as two and one-half years old can be taught to use the phone in emergency situations．Here are some points. Memorizing certain facts is important．Teach your children their names,and the section of town where you live．Try to keep what they learn within their abilities．Simple information,learned well,is better than difficult information only partly learned. Be sure your children know how to use the telephone．They should be taught to dial"zero"for the operator,at the very least．And they should be taught to dial"911"if it is used in your town. Practice over a period of several days．Over-learning is necessary so the child can act automatically in case of emergency. If you would like a booklet giving instructions on calling for help,write Telephone For Help,Box 99,Bowling Green Station,New York,NY 10004. From this passage,why is it a good idea for children to learn how to use the telephone?
A、Children have fun dialin
B、Emergencies happen without warnin
C、Children can wake their parent
D、Dialing can help children with their math stud
【正确答案】：B
【题目解析】：从文章中可以明确看出，文章主要讲述了在紧急情况下，儿童学习如何使用电话的重要性。文章首先通过一个四岁女孩在火灾中成功拨打“0”请求帮助并避免悲剧的实例来引入主题。接着，文章强调了母亲在紧急发生前几天教孩子如何打电话求助的重要性，并给出了几个教育孩子的要点。 现在我们来分析每个选项： A. Children have fun dialing（孩子们喜欢拨号） 这个选项并未在文章中被提及或支持，文章并没有说孩子们拨打电话是为了乐趣。 B. Emergencies happen without warning（紧急情况会突然发生） 这个选项与文章的主题和内容紧密相关。文章通过实例和后续的教育建议强调了紧急情况下儿童使用电话的重要性，这正是因为紧急情况可能随时发生，没有任何预兆。 C. Children can wake their parent（孩子们可以叫醒他们的父母） 虽然文章中的小女孩试图叫醒她的母亲但没有成功，但这并不是文章强调的重点。文章的重点是教孩子们在紧急情况下如何自己拨打求助电话。 D. Dialing can help children with their math studies（拨号可以帮助孩子们学习数学） 这个选项与文章内容完全无关，文章没有提到拨号与数学学习有任何联系。 综上所述，选项B“Emergencies happen without warning”最符合文章的主题和意图，因此是正确答案。