应邀讲基于课文的任务设计，许久不讲这一话题了，但最近出现的一些对任务教学的价值判断，使我在被提供多个话题选择时，选择了这个话题，主要是想发出一点希微的声音。特分享。

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根据需要附上原文：
The greatest train in Canada and one of the world's greatest train journeys, VIA Rail's Canadian runs 3 times a week in summer, twice a week in winter, linking Toronto, Winnipeg, Edmonton, Jasper National Park in the Rockies & Vancouver.

The whole journey takes 4 nights. The journey originally took 3 nights, but in December 2008 VIA Rail changed the timetable to show their passengers more of the Rockies in daylight.

Today's Canadian takes the more northerly Canadian National route across Canada via Edmonton and Jasper completed in 1917.

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