【答案解析】加拿大最早的定居者来自亚洲，他们从西伯利亚出发，穿过白令海峡，来到阿拉斯加。在新的环境中，他们形成了多种新的语言和文化。16世纪，第一批欧洲人来到加拿大东部，他们来自英国和法国。通过与当地居民缔结条约，他们逐步在加拿大东部和中部建立了殖民地。经历了一场战争之后，英国夺取了法国在魁北克和加拿大东部的殖民地。到18世纪末，加拿大全境都被英国统治。现在，每年都有大量来自亚洲、非洲和南美洲的人们移民到加拿大。 [解析]
The original settlers of Canada came from Asia by crossing the Bering Strait from Siberia to Alaska. In their new environment they developed many new languages and cultures. In the 16th century the first Europeans arrived in eastern Canada. They came from Britain and France. By making treaties with the original inhabitants they gradually established colonies in eastern and central Canada. After a war with France, Britain took over the French colonies in Quebec and eastern Canada. By the end of the 18th century all of Canada was under British rule. Now every year there are many people from Asia, Africa and South America who immigrate to Canada.

【答案解析】让我来谈谈人身安全问题。在美国要当心犯罪事件。要记住，良好的判断和基本的常识可以大幅降低经历不快，乃至受到伤害的可能性。有一些基本的安全原则：晚上不要独自行走；离开房间时确保门窗都要锁好；不要携带过多现金或佩戴昂贵首饰；不要搭便车，也不要让别人搭便车；当心挎包和钱包，特别是在拥挤的闹市区，那里可能会有扒手。 [解析]
Let me say a few words about personal safety. In the U.S. one must be aware of crimes. Remember that good judgment and common sense can significantly reduce chances of having an unpleasant and perhaps harmful experience. Here are some basic safety rules. Do not walk alone at night. When you leave your room, make sure that all doors are locked and all windows are secured. Do not carry too much cash or wear jewelry of great value. Do not hitchhike and do not pick up hitchhikers. Be careful of purses and wallets, especially in crowded metropolitan areas, where there may be pickpockets.