The Code of Visiting Yellowstone National Park
The following regulations have been sorted for your convenience.
Emergency Phone： Dial 911
Yellowstone is a wilderness filled with natural wonders that also have potential dangers. There is no guarantee of your safety. Regulations are strictly enforced to protect you and the park's resources.
Do not approach wildlife, no matter how calm they appear. Always obey instructions from park staff on the scene.You must stay at least 100 yards away from bears and wolves and at least 25 yards away from all other large animals―bison, elk, bighorn sheep, deer, moose, and coyotes. Do not feed any animal. It harms them and it is illegal.
Boardwalks and trails protect you. You must stay on boardwalks and designated（指定的） trails. Pools may be near or above the boiling temperatures and can cause-severe r possibly even deadly burns.
● Keep your children close to you at all times ； make sure they understand the danger.
● Pets are prohibited in thermal areas.
● Swimming or bathing in thermal pools or streams is prohibited. Where swimming is allowed, swim at your own risk.
● Poisonous gases may exist at dangerous levels. If you feel sick, leave immediately.
Yellowstone's weather can change quickly and bring cold temperatures, high winds, rain and falling snow.
● Be prepared for changing temperatures, storms, and emergencies.
● Carry adequate clothing.
● Unless otherwise posted, the top speed throughout the park is 45 mph.
● If you see wildlife while driving, do not stop or pause in the roadway.
21. What do we know about Yellowstone National Park?
A.It allows visitors to feed some animals.
B. It gives visitors a free ride in the park.
C.It will punish visitors if they bring their pets.
D.It not only offers visitors pleasure but also there may be dangers.
22. When visiting Yellowstone, what are you advised to do?
A.Swim in the designated places.
B.Tap those calm animals gently.
C.Pull up to take photos of animals.
D.Bring some cloths to avoid poisonous gases.
23. Why is the text written?
A.To explain the facilities of the park. B. To introduce the features of the park.
C. To offer some guidance to visit the park. D. To attract more people to visit the park.
Brandon Olsen and Tylor Fritz of Hometown Sanitation（公共卫生）left gifts for three sisters who waved to them each Thursday after learning that one of them, 3-year-old Rose, had been fighting cancer.
The men also gave their parents free garbage service for one year.
"When they did that, it was a few weeks before the diagnosis（诊断）when every day just felt so impossible," said Rose's mother, Angie Evenson, of Blue Earth, Minnesota. "Nothing in reality changes Rose's diagnosis. But what they did makes us feel we are truly not alone in this fight. ”
With binoculars（双筒望远镜）in hand, Rose and her two sisters, Grace, 5 and Sophia . 2 sat by the window and waved at their garbage men, Olsen and Fritz, as they drove by on their weekly route.
Olsen, 29，and Fritz, 24, told ABC News that the girl's smiling faces are what they look forward to while working. They even left Halloween candy for the girls this year to show their appreciation. They hope that more and more people can understand and support their work.
But weeks later, Evenson wrote Olsen and Fritz a note explaining that little Rose wouldn't be able to wave to them for a while since she'd be undergoing chemotherapy（化疗）. Rose had been diagnosed with Stage 4 kidney cancer in September.
“As a father of three, it changed my outlook on things," Olsen said. “It opened my eyes... you don't know what someone else is going through.''
Fritz said he cried when he read the note. "I got to the chemo part and there were tears running down my face," he recalled. "I don't have any children of my own, but I can imagine if someone very close to me is diagnosed as cancer, I'll be heartbroken. ”
“Rose is being treated at Sanford Children's Hospital in Sioux Falls, South Dakota. She will miss a few more Thursdays, when she can wave to her garbage men, but her chemo sessions will be switched to Mondays soon and she'll be back by the window early next year. I have confidence in Rose's recovery her mother said.
24. How did the garbage men help Rose’s family?
A.They took the sick girl to hospital regularly.
B.They collected the garbage for free.
C.They looked after Rose in turn.
D.They offered money to help cure Rose.
25. What can we learn about the garbage men?
A. They made the family famous.
B They encouraged the family.
C.They gave Angie Evenson a good lesson.
D.They doubted about the doctor's diagnosis.
26. What do the garbage men wish for in terms of the girls' smiling faces?
A.People's appreciation for their work.
B.Good friendship with the young girls.
C.Making more efforts to do their work well.
D.The girls' family's caring more for their children.
27. What can we infer from the passage?
A.Olsen has three sons.
B.Fritz has not got married.
C.Fritz is faced with a serious disease.
D. Evenson is optimistic about Rose's condition.