There is no believable evidence for the existence of Bigfoot or to put it another way, there’s really quite a lot of evidence, but unfortunately it’s very poor quality. That’s a problem for Bigfoot-believers because if the creature really does exist, then it must exist in fairly big numbers. Otherwise, it would long ago have gone extinct（灭绝）.
“Not a single dead body has been found,” said Joe Nickell. “While we can’t prove Bigfoot doesn’t exist. It’s fair to point out that we can’t prove that the fairy doesn’t exist. We can’t prove that there are no leprechauns（妖精）.”
The Bigfoot myth is fueled by human hopes and fears. In that manner it is similar to other myths.
“We are hopeful that we are not alone in the universe, so we believe in extraterrestrials （外人）,” Joe Nickell said. “We are fearful of the unknown, so we imagine monsters （妖怪）.”
Craig Woolheater, of the Texas Bigfoot Research Centre, agreed that there are “a whole lot of questions and not many answers”.
“What we’re trying to do is get some answers and gather hard evidence. I think we’re dealing with an animal that is fairly rare,” Woolheater added. “So you’re talking about something that is probably a hundred times more rare than a black bear, and certainly a lot more rare than a mountain lion, and those animals aren’t seen all that often.”
Meanwhile, the Institute of Texan Cultures is taking a democratic （民主的）approach. The final portion of the exhibition gives visitors a chance to vote on whether or not they believe the evidence is believable. On the first day, “yes” outweighed “no” 178 to 53.
64. What is the purpose of the passage?
A. To discuss whether Bigfoot exists. B. To tell readers where Bigfoot lives.
C. To give readers a definite answer. D. To improve readers’ interest about Bigfoot.
65. According to Joe Nickell, ________.
A. Bigfoot’s dead bodies are familiar with people
B. Bigfoot is the result of people’s hopes and fears
C. leprechauns don’t exist
D. people are polite to Bigfoot
66. According to the passage, Woolheater ________.
A. thinks there are no questions about Bigfoot B. gets his answers from exhibitions
C. believes the voting is a democratic way D. seems to think Bigfoot exists
67. From the last paragraph we learn that ________.
A. the Institute of Texan Cultures thinks Bigfoot exists
B. most people trust the Institute of Texan Cultures
C. most people think Bigfoot exists according to the vote
D. the Institute of Texan Cultures is a democratic organization