【答案解析】随着人口的增长，生活水平的提高，交通运输条件的改善，人们闲暇时间的增多以及其他一些因素，旅游业将会继续发展壮大。据世界旅游组织预测，在未来20年里，世界旅游人数将会是现在的三倍。到2020年，将会有16亿的旅游者出国旅游，这将会给旅游热点地区的自然、文化、社会经济环境带来更大的压力。因此，必须进一步加大力度，对旅游业可持续发展进行研究。 [听力原文] Tourism is expected to grow continuously in the future owing to population growth, improved living standards, advancement of transportation systems, increasing free time and other factors. According to forecasts by the World Tourism Organization, international tourist arrivals are likely to almost triple over the next two decades, with nearly 1.6 billion tourists visiting foreign countries by the year 2020. This will further increase the pressure on the natural, cultural and socio-economic environments of popular destinations. More intensified efforts to address sustainability in tourism development are required.

【答案解析】从你抵达我们国家的那一刻开始，你就务必要小心那些职业扒手。现在我教你如何保护自己。女士们携带的提包如果背在前面，扒手就很难下手，因为她们没有视野的死角。如果你要使扒手更难下手，那就使用拎包而不是挎包。对于男士来说，放钱包的最好的地方是他们穿的紧身长裤的后袋。如果有人想偷钱包，你就会马上感觉到。另一个安全的地方是扣上钮扣的夹克衫内袋，因为小偷根本没有地方可以伸手进去。更好的方法是，你可以把钱包用一根绳或者链子紧紧地拴在你的皮带上。 [听力原文] Once you have arrived in our country, beware those professional pickpockets. Here's how to protect yourself. Women whose bags are hanging in front of them are tricky for the thieves, as there isn't a blind side. If you want to make it even harder, use a bag with handles rather than a strap. For men, one of the best places to keep a wallet is in the back pocket of tight trousers. You'll feel any attempts to move it. Another good place is in the buttoned-up inside pocket of a jacket. There's just no way in. Even better, keep wallets attached to a cord or chain that is fastened to a belt.