题目内容：

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 plane all the way, they 1.（plan）to fly to Vancouver and then take the train from west to east across Canada. The thought that they could cross the whole continent was 2.(excite).

Canada is the second biggest country in the world. People say Vancouver is Canada’s most beautiful city3.(surround)by mountains and the Pacific Ocean. On the coast north of Vancouver, it is so wet there that the trees are extremely tall.

That afternoon aboard the train, the cousins settled down in their 4.(seat). Their next stop was Calgary,   5.is famous for the Calgary Stampede. They know that cowboys come from all over the world 6.(compete)in the Stampede. Many cowboys have a gift7.riding wild horses. They also learned that most Canadians live within a few hundred kilometers of the USA border and that Canada’s population is only8.(slight)over thirty million, but now they 9.(amaze)to see such an empty country. Then they arrived in10.urban area, the busy port city of Thunder Bay at the top of the Great Lakes.