根据以下资料，回答196-199题。　　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

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答案：

B

解析：

从文中可以推断，突发事件是不可预料的，因此让孩子们学会如何使用电话是一个好主意。文章中提到，母亲教给小女孩打电话求助的技巧，帮助避免了悲剧的发生。因此，选项B“紧急情况的发生不可预料”是正确的答案。

From this passage, why is it a good idea for children to learn how to use the telephone?

答案：

解析：

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