【文章內(nèi)容簡介】 6 t0 20 years in captivity． In the wild， their lives are smaller due to their natural enemies． Their skin color ranges anything between light green and dark green， depending on the temperature of the place where they live and the co1or of the environment around where they live,as it’s supposed to make them difficult to be seen by their natural enemies． They e out only at night to hunt， feed and mate． During the day，they find dark， wet areas to sleep in． They aren’t seen at all during the winter ． As the Australian tree frog isn’t equipped with teeth ． it cannot tear apart its prey(獵物 )． It needs to feed on food that can fit in its mouth． Therefore its diet consists of insects， such as spiders， and flies， and small animals， such as other frogs， bats and sometimes even mice． For the smaller prey， they use their sticky tongues to shoot at the close range prey． For larger prey, they attack the prey and force it into their mouths with their hands. They also have some natural enemies that feed on them． The Australian law protects the tree frog by giving it a protected status The IUCN International Union for Conservation of Nature)， however， gives it a“l(fā)east concern”sta tus． The broad range of habitats(棲息地 )that the frog can survive in and its long life ensure that this frog won’t lose population ． This creature is really a very popular pet If you get an Australian green tree frog as a pet， do remember to feed it in proper amounts and let it loose for exercise． 28. What can be the main idea of the passage? A． How to keep frogs as pets B． Animals unique to Australia C. Facts about the Australian tree frog. D． Why frogs can make good pets? 29. What can we know about the skin color of Australian tree frogs? A. It changes at different times of the day． B. It helps them with their hunting for food． C. It shows what development stage they are in． D. It offers them a certain degree of protection. 30. Paragraph 3 mainly talks about the Australian tree frog’s _____. A. feeding and hunting habits B. natural enemies C. living environments and inhabitats D. survival skills can we know about the Australian tree frog from the passage? A. There is no law protecting it yet. B. Its teeth help tear its prey into pieces． C. It sleeps in the daytime and hunts at night． D. It has been declared an endangered species by the IUCN． D A poor set of curtains may not just mean you wake up too early they could also make you fat. Sleeping in a room with too much light has been linked to an increased risk of piling on the pounds, a study shows. Greater exposure to light at night raised bout body mass index and waist size in more than 113,000 women taking part in the British study. The study followed the women for 40 years to identify root causes of breast cancer. Obesity is a known risk factor for the disease. “The associations we saw in our study between light exposure at night and obesity are very interesting. We cannot yet tell at this stage what the reason for the associations is, but the results open up an interesting direction for research.” Said Prof. Anthony Swerdlow, from the Institute of Cancer Research. “ One possible explanation is that the light is interrupting the body clock, which stems from our evolutionary past (進化歷程 ). We were active when it was light in the day and restful when it was dark at night. ” Other research has found the effect of nighttime lightning on the body may contribute to unhappy feelings. But it’s too early to suggest that sleeping in the dark will help prevent obesity, a known risk factor for breast cancer. The findings are reported in the American Journal of epidemiology. Previous research has drawn similar conclusions. A team at Ohio State University examined how nighttime light affects weight, body fat and glucose icose intolerance (葡萄糖過敏 ) in mice. They found that continuing exposure to even a little nighttime light caused increases in all three aspects. Light changes mood, physical strength and even the way we process food in a 24hour cycle. Artificial light is known to interrupt the body clock by delaying the production of the sleep hormone melatonin(睡眠荷爾蒙退黑激素 ). So there is no harm in trying to make bedrooms darker. 32. What does the underlined part “piling on the pounds” in the first paragraph mean? A. Putting pounds into a pile. B. Filling in with pounds. C. Making a lot of money. D. Gaining body weight. 33. From the passage, we know that ________. A. Sleeping in the dark must help prevent obesity B. Lighting at night makes people happy C. Nighttime light may affect human beings and mice D. it is ea