

The tourist industry is considered to be the world's largest industry. The direct economic impact of the industry, including accommodation, transportation, entertainment, and attractions, is worth trillions of dollars every year. The statistics show that the number of international tourist (1) __ worldwide reached 1.04 billion in 2012.
Such large (2) __of tourists, however, are beginning to cause problems. For example, in the Alps the many thousands of skiers are (3)__ the mountains they came to enjoy. Even parts of Mount Everest in the Himalayas are reported to be covered with old food tins, tents, and pieces of equipment that have been (4)__ away.
At a time when we have greater freedom to travel than ever before, more and more people are asking how they can enjoy their holidays (5) ______ causing damage to their destinations.
Now there is a new holiday guide (6) ___ Holidays That Don't Cost the Earth. It tells you how you can be a responsible tourist by asking your travel agent or your tour operator the right questions before you book a holiday.
4. A. put B tidied C. given D. thrown
5. A. outside B instead C. beside D. without
II.
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