题目内容：

I spent most my twenties working for the National Park Service, and I lived a wide variety of government housing, including several shabby but appealing old houses where the wild creatures outnumbered humans. Sometimes I wondered, lying awake at night, how many hearts beat inside those walls. With all that lovely national park habitat protected for their use, why did the animals need to live in my house?

My latest essay “The indoor wilds at outdoor parks,” revisits my experiences with wild (non-human!) roommates and officemates in Rocky Mountain National Park. At first, they were considered annoying but not dangerous. Attitudes changed dramatically when hantavirus (汉他病毒) came on the scene, and suddenly those cute, non-housebroken deer mice became a threat. When I moved on to Canyonlands National Park, I found that every effort had been made to seal off my house from four-footed intruders. These efforts mostly worked and later employees moved into new housing. But somehow a rat still managed to chew its way through the floor and drown itself in my toilet. I’m not even going to get started about my coworkers, experiences with other much scarier animals.

The Beaver Meadows Vistor Center in the story was designed by Tailiesin Associated Architects, Frank Lloyed Wright’s firm, after Wright’s death. Working there, I always thought the building was strange. I recently revisited the building while researching a children’s book I am writing about the park. I think I get it now, at least a little.

1.What does the underlined word “their” in Paragraph 1 refer to?

A. Some park visitors’.    B. Endangered animals’.

C. The author’s coworkers’.    D. The author’s wild roommates’.

2.Why did people show a change in attitude towards deer mice?

A. Because a virus was spreading.    B. Because people were hurt by them.

C. Because people saw a really cute one.    D. Because they protected people’s houses.

3.What can we infer about the living conditions of the author’s coworkers?

A. They were unknown to the author.    B. They were acceptable to the author.

C. They were no better than the author’s.    D. They were much better than the author’s.

4.After visiting the Beaver Meadows Vistor Center again, the author ________.

A. could appreciate it better    B. finished a children’s book

C. did research on national parks    D. knew it was designed by Wright