【正文】 of lakes and forests, as well as wide rivers and large cities. Some people have the idea that you can cross Canda in less than fice days, but they forget the fact that Canada is 5500 kilometers from coast to coast. Here in Vancouver, you’re in Canada’s warmest part. People say it is Canada’s most beautiful city, surrounded by mountains and the Pacific Ocean. Skiing in the Rocky Mountains and sailing in the harbour make Vancouver one of Canada’s most popular cities to live in. Its population is increasing rapidly. The coast north of Vancouver has some of the oldest and most beautiful forests in the world. It is so wet there that the trees are extremely tall, some measuring over 90 metres.”After two days’ travel, the girls began to realize that Canada is quite empty. At school, they had learned that most Canadians live within a few hundred kilometres of the USA border, and Canada’s population is only slightly over thirty million, but now they were amazed to see such an empty country. They went through a wheatgrowing province and saw farms that covered thousands of acres. Afrer dinner, they were back in an urban area, the busy port city of Thunder Bay at the top of the Great Lakes. Because of the Great Lakes, they learned, Canada has more fresh water than any other country in the world. In fact, it has onethird of the world’s total fresh water, and much of it is in the Great Lakes.The next morning the bushes and maple trees outside their window were red, gold and orange, and there was frost on the ground, confirming that fall had arrived in Canada.They saw the covered stadium, home of several famous basketball teams. As they walked north from the harbour area, Li Daiyu said, “Lin Fang, one of my mother’s old schoolmates, lives here. I should phone her from a telephone booth.”The train left late that night and arrived in Montreal at dawn the next morning. At the station, people everywhere were speaking French. There were sighs and ads in French, but some of them had English words in smaller letters. “We don39?！癏ello, my name is Henri. I’m a student at the university nearby,” he said,” and I was wondering where you are from.” The girls told him they were on a trp across Canada and that they had only on day in Montreal. “That39。That night as the transfer was speeding along the St Lawrence River toward the Gulf of St Lawrence and down to the distant east coast, the cousins dreamed of French restaurants and red maple leaves.Iqaluit – the frozen townBeth said, “ I knew it would be could in January, but not this cold! Maybe there is a dog sled that can take me into town.”Beth answered, “ I’m writing a story for my newspaper about Iqaluit – we’d like to advertise it as a holiday place, but I think it’s too cold.”“I’m business man. My grandfather would live in ice houses when he hunted in winter, but not so many people do that now. the old men used to make one in a few hours. They used to live in skin tents in summer – the tents were easy to move so the people could follow the animals.”Simon replied, “It’s dark in the day because we are so far north. You should e in June. The sun shines all night in the north then. That39。必修四A STUDENT OF AFRICAN WILDLIFEBefore we leave, Li Yanping explained to me that the forece of the gravity would change three times on our journey and that the first change would be the most powerful. Then we were off. As the rocket rose into the air, we were pushed back into our seats because we were trying to escape the pull of the earth’s gravity. It was so hard that we could not say anything to each other. Gradually the weight lessened and I was able to talk to him. “ Why is the spaceship not falling back to the earth? On the earth if I fall from a tree I will fall to ground.” I asked. “ We are too far from the earth now to feel its pull, “ he explained, “ so we feel as if there is no gravity at all. When we get closer to the moon, we shall feel its gravity pulling us, but it will not be as strong a pull as the earth’s. “ I cheered up immediately and floated weightlessly around in our spaceship cabin watching the earth bee smaller and the moon larger.Leaving the moon’s gravity was not as painful as leaving the earth’s. But returning to the earth was very frightening. We watched, amazed as fire broke out on the outside of the spaceship as the earth’s gravity increased. Again we were pushed back hard into our seats as we came back to land. “ That was very exhausting but very exciting too,” I said. “Now I know much more about gravity! Do you think we could bisit some stars next time?” “Of course,” he smiled, “ which star would you like to go to?”The spaceship warned Li Yanping and me to be ready as we were approaching the “black hole”. We could see some faint lights around what looked like an empty space. Li Yanping said, “ That empty hole is like a mouth always needing to be fed. Those lights are thins that are being pulled into time by the gravity of the hole.” We watched with interest and amazement at the lights which seemed to be going fainter and fainter round the edge of the black hole. Just then the lights on our spaceship went our the and the puter stopped working. What was happening? I tried to turn the spaceship away from the hole but it would not move. Would it eat us too?But then the spaceship jumped again. This time it moved sideways and away from this edge of the “black hole”. Someone watching me would have seen the spaceship flying like a bird away from the “black hole”. But we felt nothing. At last we were able to look around us. Luckily the puter had started working again. We realized that we had discovered something new about “black hole”. If you go inside the edge of a “black hole”, it will “eat” you and there is no escape。A trip on “ The True North”Their friend, Danny Lin, was waiting at the airport. He was going to take them and their baggage to catch “The True North”, the cross Canada train. On the way to the statiion, he chatted abo