4.Li Daiyu and her cousin Liu Qian were on a trip to Canada(61)to visit(visit) their cousins.They decided to fly to Vancouver and then take the train from west to east(62)acrossCanada.
Vancouver is Canada's most beautiful city,(63)surrounded(surround) by mountains and the Pacific Ocean.Aboard the train,the cousins settled down in their sats.When they crossed the Rocky Mountains,they(64)managed(manage) to catch sight of some mountain goats and even a grizzly bear and an eagle.In Calgary,they learned that cowboys,many of(65)whomhad a gift fo(66)rriding(ride) wild horses,came from all over the world to compete in the Stampede.
After two days'travel,the girls began to realize that Canada is quite empty.At school,they(67)had learned(learn) that most of Canadians live within a few hundred kilometers of the USA border,and that Canada's population is only(68)slightly(slight) over thirty million,but now they were(69)amazed(amaze) to see such an empty country.
That night(70)as/whenthey slept,the train rushed southward towards Toronto.