(单选题)

What is the text mainly about?

A.The rise and fall of a city.

B.The gold rush in Canada.

C.Journeys into the wilderness.

D.Tourism in Dawson.

参考答案：A

参考解析：

主旨大意题。根据第一段中第五句“But not all cities develop slowly over a long period of time. Boom towns grow from nothing almost overnight.”和最后一段第三句中“…when they heard there were new gold discoveries in Alaska, they left Dawson City as quickly as they had come.”以及最后一句“Tourism is now the chief industry of Dawson City — its present population is 762.”可知，文章主要讲述了一座城市（Dawson City）的兴衰。故选A。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语