题目内容：

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Hiking tours are a kind of adventure (冒险) tourism. Generally speaking, these vacations focus almost entirely 1. hiking from one place to another. Hiking tours can be done as a group activity or alone.

There are many different ways of organizing hiking tours. Some people like to go out into the areas where there are very few people and travel over long 2. (distant) from one place to another. They usually stay in hotels overnight before 3. (travel)to the next place on the following day.

Guides can make hiking trips safer and more focused. Some hikers prefer to take hiking tours without guides because of costs or because they want to challenge 4. (they). However, employing a 5. (rely) guide during a hiking tour 6. (consider) as a better choice for less experienced hikers.

The activity can be very tiring, and those 7. are new to hiking may worry that they aren’t 8. (physical) able to finish the tours. Sometimes it can be helpful for people 9. (go) to the doctor and make sure it is safe for them to choose 10. difficult hike. Sometimes, a challenging hike can be deadly for someone having heart disease.