阅读下面短文，在空白处填入一个适当的词，或填入括号中所给单词的正确形式。
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 ____（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 ____(excite).
Canada is the second biggest country in the world. People say Vancouver is Canada's most beautiful city ____(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 ____(seat). Their next stop was Calgary,____ is famous for the Calgary Stampede. They know that cowboys come from all over the world ____(compete)in the Stampede. Many cowboys have a gift ____ 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 only ____(slight)over thirty million, but now they ____(amaze)to see such an empty country. Then they arrived in ____urban area, the busy port city of Thunder Bay at the top of the Great Lakes.
