【文章內(nèi)容簡介】 as minus 10 degrees Fahrenheit. But salt can lower the freezing point of water and melt ice. The source of the water is a mystery. Scientists noted it could be melting ice. It could be an underground aquifer, which is rock or sand that can hold water. It is possibly water vapor from the thin Martian atmosphere, Or it may be a bination Michael Meyer, lead scientist for NASA39。s Mars exploration program, said the only definitive way for now to determine whether there39。s life on Mars is to collect rocks and soil for analysis on Earth something a U. S. lander set for liftoff in 2020 will do. 28. What would be the best title for the text? 39。 A Streams of Water Spotted on Mars B. Astronauts will Land on Mars C. NASA39。s Mars Exploration Program D. A Breakthrough in the Exploration of Mars 29. According to John Grunsfeld, there seems to be on Mars. A. salty water B. standing water C. rocket fuel D. human beings are uncertain about the of the water on Mars. A. state B. source C. temperature D. taste 31. What matters to the existence of liquid water on Mars? A. The distance from the sun. B. The favorable climate. C. The gravity of the earth D． The salt in it． D Teachers say the digital age has had a good influence — and a notsogood influence — on this generation of American teenagers. More than 2,000 teachers took an online survey. Threequarters of the teachers said the Inter and digital search tools have had a “ mostly positive” effect on their students’ research habits and skills. But 64 percent said the technologies “ do more to distract (使??分心 ) students than to help them academically.” And 87 percent agreed that these technologies are creating an “ easily distracted generation with short attention spans.” The Pew Inter Project did the survey with the National Writing Project. Judy Buchanan is the vice director of the National Writing Project and a coauthor of the report. Ms. Buchanan says digital research tools are helping students learn more and faster. “Teachers really favor these tools because they are ways to make some of the learning exciting and engaging. Young people favor these tools. The goal is to really help them bee creators of meaningful content, and not just sort of consumers.” But one problem the survey found is that many students lack digital literacy. They trust too much of the information they find on the Inter. Judy says these students haven’t developed the skills to determine the quality of online information. “ It’s something that really has to be taught and paid attention to. Because in a world in which things happen quickly, you do need to step back, reflect and analyze the information you have.” Another problem is blamed on something that might not seem like a problem at all: being able to quickly find information online. Teachers say the result is a reduction in the desire and ability of their students to work hard to find answers. They say students are overly dependent on search engines and do not make enough use of printed books or research libraries. Many teachers are also concerned that the Inter makes it easy for students to copy work done by others instead of using their own abilities. 32. The text mainly tells us _________. A. all the students use digital tools B. the Inter is playing a key role C. teachers encourage using digital tools D. digital tools bring about benefits and problems 33. Which of the following best shows the structure of the text? A. B. C. D. ① ① ① ① ② ③④ ② ③ ④ ② ③④⑤ ②③ ④⑤ ⑤ ⑤ (① =Para 1, ② =Para 2, ③ =Para 3, ④ =Para 4, ⑤ =Para 5) 34. The underlined sentence in the third paragraph probably means _________. A. students do not have the right digital tools B. students do not always have access to the Inter C. students haven’t the ability to adjust themselves D. students can’t judge online information properly 35. Some students don’t tend to work ha rd because _________. A. they can get answers on the Inter quickly B. printed books and libraries around aren’t enough C. the Inter can’t m ake students concentrate D. they can copy each others’ work without being punished 第二節(jié) (共 5小題，每小題 2分，滿分 10分 ) 根據(jù)短文內(nèi)容，從短文后的選項中選出能填入空白處的最佳選項，選項中有兩項為多余選項。 May the first is an important date in the college admission process in the United States