【文章內(nèi)容簡介】 They help with vision by lubricating (潤滑) and clearing the eye. They also protect the eye against infection and provide nutrition to the cornea (角膜), the eye’s clear outer layer, which lacks blood tubes, he says.Learning how reptiles and birds use tears may also inspire new medications for conditions such as dry eye, which occurs when tear tubes don’t produce enough oil. The disease, mon in cats, dogs, and people, can sometimes lead to blindness.28. What is paragraph 3 mainly about?A. The source of tears. B. The position of tears.C. The classification of tears. D. The definition of tears.29. What does the underlined word “phony” in paragraph 4 mean?A. False. B. Regretful. C. Cold. D. Tricky.30. Which statement does Lionel Sebbag agree with?A. Weeping contributes to eye disease. B. Tears oil and clear the eyes.C. The cornea has rich blood tubes. D. More tears mean better vision.31. What might be the best title for the text?A. Tears, a Barrier to Eyes B. A Better Treatment for Eye DiseaseC. Nonhuman Tears May Promise New Cures D. Other Species’ Tears Are Similar to Humans’D Today, Mars is a frozen desert with a thin atmosphere, too cold for liquid water to remain on the surface. Overwhelming evidence exists that Mars had liquid water oceans roughly 4 billion years ago. The question that drives our interests isn’t whether there’s life on presentday Mars. We are driven instead by asking whether there was life on Mars billions of years ago, which seems significantly more likely.But if water existed on the Marian surface before, how was it possible? Mars is further away from the sun than Earth, and billions of years ago, the sun didn’t throw off as much heat as it does now.The planet’s protective magnetic field mysteriously disappeared around billion years ago as Mars cooled after forming. The sun’s solar wind then blew away the Martian atmosphere, leaving behind the thin one the planet has today.Scientists believe the atmosphere was a key ponent for a warm, wet Mars that may have once hosted life. To have made the planet warm enough for liquid surface water, its atmosphere would likely have needed a large amount of greenhouse gas, carbon dioxide specifically.Currently, we don’t know the carbon dioxide content of Mars ancient atmosphere. So the researchers turned to the Nordlinger Ries crater (隕石坑) in southern Germany. It was created by a meteorite (隕石) impact 15 million years ago. That geology and the chemistry of the site act as a good similarity to the Martian surface.Researchers will study the pH and nitrogen that might have been in ancient Martian water, which will show the carbon dioxide content in its ancient atmosphere. That will throw light on whether Mars was once warm enough to support life.The Mars 2020 rover (探測器) will land in a similar crater next year, collecting samples that will be returned to Earth in a future mission. It could be 10 to 20 years before Mars samples are brought back to Earth. We might know the answer to one of the first questions once these samples are distributed to labs in the US and throughout the world.32. What are people more interested in about Mars?A. Whether there was ever life on Mars. B. Whether there is life on Mars now.C. Whether there was ever water on Mars. D. Whether it is possible for life on Mars.33. Why was the Martian atmosphere blown away by solar wind?A. Because Mars was too cold. B. Because Mars lost its magnetic field.C. Because Mars had no water on it. D. Because Mars was too far from the sun.34. What do researchers want to find out in the Nordlinger Ries crater?A. How this crater was formed. B. Why Mars is not suitable for life.C. Whether there is any life sign on Mars. D. How much carbon dioxide is in Mars’ ancient atmosphere.35. What can we infer from the last paragraph?A. Mars samples will be brought back to earth in 2021.B. It takes at least ten years for people to reach Mars.C. Many countries take part in the research of Mars.D. Mars samples will help discover all the secrets of Mars.第二節(jié)（共5小題；每小題2分，滿分10分）閱讀下列短文，從短文后的選項(xiàng)中選出可以填入空白處的最佳選項(xiàng)，選項(xiàng)中有兩項(xiàng)為多余選項(xiàng)。Five Ways to Work Smarter, Not HarderNo matter how hard we work, it seems that there is never enough time to get all the important tasks done. Rather than working longer, consider working smarter, not harder. Here are some ways to work smarter:Make a careful plan.Just like every organization needs a business plan, an efficient worker needs a work plan. 36 Schedule your tasks throughout the days, weeks, and months, but do it ahead of time.Set your goals.As a part of your work plan, you should set clear and measurable goals. Goals should state which tasks are to be pleted and when they get pleted. Rather than setting firm deadlines, which can lead to pressure and stress, allow a period of time to reach goals. 37 3