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There's nothing better than flying to a foreign destination to visit the attractions it【小题1】 (have) to offer. Millions of people are doing the same, and why not? The world has an amazing variety of must-see sights, from breathtaking natural scenery to impressive old cities. But the problem is that too many of us 【小题2】 (visit) them at the same time, putting pressure on these delicate and ancient places. That's why a number of beauty spots and historic sites have been introducing charges or restrictions on the number of tourists. There are many reasons for this: to reduce overcrowding, to manage wear and tear on old buildings and to tidy up the mess 【小题3】 (leave) behind.