题目内容：

阅读下面的短文和问题，根据短文内容，在相应题号后的横线上写下相关信息，完成对该问题的回答。答语要意思清楚，结构正确，书写工整。

Patrick and Rachel Hugens have biked around the world. The Hugenses, who live in Boise when not on their bikes, are 25 months into their latest round-the-world adventure, scheduled to end in March. They've visited 36 countries on this tour, touching Europe, Africa, Asia and South America. “Traveling by bike is the greatest freedom," Rachel said via email. “You can see people's daily lives and can communicate with them.”

Rachel warns, “Cycle touring can become addictive.” Bike tourism is on the rise in the United States and around the world, according to the Adventure Cycling Association. The U. S. Bicycle Route System has grown 66 percent in the past two years and now has a presence in 24 states, including Idaho, and the District of Columbia.

Dennis Swift，secretary of the Southwest Idaho Mountain Biking Association, rode across the U.S. last year- from Seattle to Salem, Mass. Six people started the tour and three finished, riding 52 out of 56 days. They averaged about 60 miles per riding day. Swift also rode through the Basque Country with a group of Boise cyclists last year. He's planning to participate in a Virginia bike tour this year. “When you get older, your health is most important,” he said. “My mom had Alzheimer's disease. They say what's good for health is good for the brain, so riding is one thing to be first in my life.”

This is the third time that the couple have quit their jobs to tour. Rachel is a nurse; Patrick is an architect. Both regained their former jobs when they returned home in 2000 and 2007. They're uncertain what will happen this time. They've given themselves a chance to save extra money by going to work by bike and avoiding some bills that are basic for most ( cell phones, cable TV).“Traveling changes your view of money and what it can do for you,” Rachel said. “We've met some cyclists traveling long term. They have many reasons to spend wisely.”

“The fellow cyclists we meet mostly come from Britain, Germany, Spain, Holland, Australia or New Zealand," Rachel said, “It is so nice to see that people all over the world are friendly and welcoming.”

1.How many countries have the Hugenses visited on their latest tour? (不多于2个单词)

___________________________________________________________________

2.Why does Dennis Swift ride bikes? (不多于2个单词)

___________________________________________________________________

3.How do the Hugenses save extra money for their bike tours? (不多于10个单词)

___________________________________________________________________

4.What is the passage mainly about? (不多于3个单词)

___________________________________________________________________