英语人教版必修三第五单元reading《a trip on the true north》,请找出里面所有的同位语从句

英语人教版必修三第五单元reading《a trip on the true north》,请找出里面所有的同位语从句
Li Daiyu and her cousin Liu Qian were on a trip to Canada to visit their cousins on the Atlantic coast.Rather than take the aeroplane all the way,they decided to fly from China to Vancouver and to take the train from west to east across Canada in September.The idea that they would cross the whole continent was exciting.
Their cousins’ friend,Danny Lin,was waiting for them at the airport.He was going to take them to the train station to catch ‘The True North’,the cross-Canada train.On the way to the station,he told them,‘You’re going to see great scenery on your trip.Canada is bigger than the United States.It is the second biggest country in the world and as you go eastward,you will see mountains,and pass thousands of lakes,forests and wide rivers as well as cities.The idea that you can cross Canada in less than five days is just wrong.It is 5,500 kilometres from coast to coast.Here in Vancouver,you are in the warmest part of Canada.Many people think it is the most beautiful city in Canada,as it is surrounded by mountains on the north and east and the Pacific Ocean on the west.Its population is increasing very rapidly,because people from the rest of Canada and those from many Asian countries want to live here.They can ski in the Rocky Mountains and sail in the harbour.On the coast north of Vancouver some of the oldest and most beautiful forests in the world still remain.It is so wet there that the trees are extremely tall.’
That afternoon on the train the cousins settled down in their seats.They crossed the Rocky Mountains earlier that day and looked out of the windows at the wild scenery.They saw mountain goats and even a grizzly bear.Their next stop would be Calgary.The Calgary Stampede is a famous Western festival.Cowboys come from all over North America to compete in riding wild horses.Many of them have a gift for working with animals and they can win thousands of dollars in prizes.
Two days later they began to realize that Canada is quite empty.Most Canadians live within 320 kilometres of the USA border,and in fact,the population of Canada is only slight1y over thirty million.They went through a wheat-growing province and saw farms that were thousands of square kilometres in size.After dinner,the cousins arrived in Thunder Bay.This city is at the top end of the Great Lakes,and it is a very busy port,although it is close to the centre of the country.The fact that ocean ships can go there surprises many people.Canada has one-third of the world’s fresh water,and much of it is in the five Great Lakes.There is more fresh water in Canada than in any other country in the world.
That night,they slept as the train rushed through the night across the top of Lake Superior,through the great forests and southward towards Toronto.

The idea that they would cross the whole continent was exciting.
The idea that you can cross Canada in less than five days is just wrong.
The fact that ocean ships can go there surprises many people.