【答案】C

　　【解析】推理判断题。由“But Bom admitted that he and his team don’t know how restructuring of memories occurs or what governs it or in which stage of sleep it works.”可知人们有不同的睡眠阶段。故选C。

　　39. What would be the best title for the passage?

　　A. How Sleep Works B. Sleep Helps Solve Problems

　　C. No Evidence, But Well Founded D. Bom’s Discovery On Sleep

　　【答案】B

　　【解析】标题归纳题。

　　40. Where is the passage most likely to have been taken from?

　　A. A science fiction. B. A book review.

　　C. An advertisement. D. A newspaper.

　　【答案】D

　　【解析】推理判断题。本文主要讲的是科学家的一项新的发现，以及有关的实验。所以最可能出自报纸。故选D。

　　阅读理解-----E

　　(2017·南昌市二模，C)

　　“Plants were expected to get larger with increased carbon dioxide in atmosphere, but

　　changes in temperature, humidity and nutrient availability seem to trumped the benefits of

　　increased carbon dioxide，” said researchers from the National University of Singapore.

　　45 percent of the species studied now reach smaller adult sizes than they did in the past. The

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