【正文】 D. About 3:30 pm 46. What would be the best title for the text? A. Just for a Rest B. All for a Nap C. A Special Sleep Pattern. D. Taking Naps in Warmer Climate. D Five million people visit Grand Canyon in the US every year. For the purpose of helping project Grand Canyon for your fellow visitors and future generations, please follow the guidelines below. Camping To project the park, camping is allowed only within permitted campgrounds. Permits are required for overnight camping at the North Rim. Advance booking can be received by mail. Please write: Information Center, . Box 129, Grand Canyon, AZ 86023 Fires Because of the extreme fire danger, campfires are not allowed except at Mather and Desert View campgrounds. Collection of firewood is not allowed either. Hiking(遠(yuǎn)足 ) Please stay on permitted paths. Otherwise you may destroy desert plants. Pack out what you pack in, so you leave no signs of your visit. It is important to keep in mind that you are in a national park where wildlife exists. Weather The weather at Gramd Canyon can change very quickly. With so much rock, lightning(閃電 ) causes a particular danger during sudden summer storms. These storms also frequently bring floods inside valleys, a danger to hikers. Watch the skies and check daily weather reports. Wildlife Do not feed park wildlife. There have been a few cases at Gramd Canyon National Park where deer(鹿 ) were purposely shot because they are plastic bags that left them sick and weak. Hungry deer can be danger and have kicked and bitten visitors at Grand Canyon. Some other animals will also beg and bite. For your own safety and the wellbeing of the animals, please do not feed wildlife, no matter how gentle they may appear. 47. What can you do first if you want to go camping? A. Know the permitted B. Book campgrounds in advance C. Make sure not to make a fire D. Stop at Mather and Desert View 48. What do the underlined words “pack out what you pack in” in Paragraph 4 probably mean? A. keep every out of campgrounds B. take away everything you bring in C. carry all the necessary food D. look after your personal belongings 49. Why were some deer killed on purpose at Grand Canyon? A. They ate wrong things and became very ill. B. They were a danger to other gentle animals. C. They begged food from visitors. D. They kicked and bit visitors. 50. What is the main purpose of the text? A. To provide travel information B. To report some recent news. C. To teach tourists hiking skills D. To introduce the wild life E At a certain time in our lives we consider every place as the possible sites(地點(diǎn) ) for a house. I have thus searched the country within a dozen miles of where I live. In imagination I have bought all the farms, one after another, and I knew their prices. The nearest thing that I came to actual ownership was when I bought the Hollowell place. But before the owner pleted the sale with me, his wife changed her mind and wished to keep it, and he offered me additional dollars to return the farm to him. However, I let him keep the additional dollars and sold him the farm for just what I gave for it. The real attractiong of the Hollowell farm to me were its position, being about two miles from the village, half a mile from the nearest neighbor, bounded(相鄰 ) on one side by the river, and separated from the highway by a wide field. The poor condition fo the house and fences showed that it hadn’t been used for some time. I remembered from my earliest trip up the river that the house used to be hidden behind a forest area, and I was in a hurry to buy it before the owner finished getting out some rocks, cutting down the apples trees, and clearing away some young trees which had grown up in the fields. I wanted to buy it before he made any more of his improvements. But it turned out as I have said. I was not really troubled by the loss. I had always had a garden, but I don’t thing I was ready for a large farm. I believe that as long as possible it is better to live free and unmitted (無牽掛的 ). It makes but little difference