【正文】 d services can be available in all the hotels. B Like most elementary schools, it was typical to have students in and out of the health clinic throughout the day. As the principal, my office was right next door to the clinic, so I often dropped in to lend a hand and help out with the hugs. One morning I was putting a Band－ Aid on a little girl39。s scraped knee, who had beautiful blonde hair. I found her a warm sweatshirt and helped her pull it on. “ Thanks for taking care of me， ” she whispered to me. It wasn39。t long after that when I ran across an unfamiliar lump under my arm, a very bad kind. I wondered whether or not to tell the students about my disease. The word cancer seemed so frightening. When it became evident that the children were going to find out one way or another, I decided to tell them myself. When I gave them a chance to ask questions, they mostly wanted to know how they could help. I told them that what I would like best would be their letters, pictures and prayers. Suddenly, my little blonde friend walked to me and threw herself into my arms. “ Don39。t be afraid, Dr. Perry， ” she said earnestly. “ I know you39。ll be back, because it39。s our turn to take care of you.” When I was in hospital, the letters and pictures kept ing until they covered every wall of my room. Then the kids traced their hands onto colored paper, cut them out and glued them together to make a rainbow of helping hands. At last I was well enough to return to work. As I headed up the road to the school, I was suddenly overe by doubts. Then I noticed a big sign hanging in front of the main door of the school. “ Wele Back, Dr. Perry， ” it read. As I drew closer, everywhere I looked there were pink ribbons. My blonde friend was first in line to greet me. “ You39。re back, Dr. Perry, you39。re back！ ” she called. “ See, I told you we39。d take care of you！ ” 25． Why didn39。t the principal want to tell his students about his disease? A． Because he thought it was useless. B． Because he thought it might scare them. C． Because he wanted to deal with it alone. D． Because he didn39。t trust them. 26． What did the students do in order to help the principal? ① Write letters ② Donate money ③ Draw pictures ④ Make a rainbow of helping hands ⑤ Sing beautiful songs A． ①③④ B． ③④⑤ C． ①②⑤ D． ①②③ 27． What is the main topic of the passage? A． The tragic misery of a cancer stricken principal. B． The importance of elementary education. C． The development of teamwork among pupils. D． The friendship between a principal and his students. C Since American students have been introduced into the era of the Massive Open Online Course(MOOC), the opportunity for cheating appears greater than ever. The all－ knowing Google search is within easy reach. So how can a teacher handle such a large number of examinees and search out cheaters taking tests on the Inter? Using technology, of course. Mettl, an online pany, has developed advanced techniques for ting cheaters. It has adopted a mass of technologies on its test－ taking platform, monitoring test－ takers39。 performance in the exam. Here39。s how it works: A test－ taker signs on to Mettl and select his/her exam from the site39。s library of pre－ loaded tests. Facial and keystroke(擊鍵 ) recognition technology confirm the person that has signed in is the very person, and the system records both the test－ taker and the test－ taker39。s screen throughout the test. Mettl39。s technology uses the test－ taker39。s webcam(攝像頭 ) to detect(察覺(jué) ) how many people are using the puter. Soon, it will track eye movement well enough to sense whether the test－taker is looking away from the screen, perhaps to consult a smartphone or a friend in secret. Mettl also monitors the test－ taker39。s screen and can detect when the test－ taker has changed a puter or moved from the test. The system will soon be able to record sound, detecting whether the test－taker is talking or being talked to. If any wrongdoings are detected, the system flags the incident and reports it back to the test39。s administrator. This can bring any number of things, depending on the test－ giver39。s wishes: a plete shutdown of the exam, a warning message that appears on the test－ taker39。s screen, even human instructions from the control center. Mettl is hoping its technology will help it break into the country39。s big MOOC markets. 28． From the first paragraph we can infer that ________． A． MOOC has replaced the traditional form of education B． teachers should be stricter in dealing with cheating C． preventing online cheating is a harder job D． Google is a software designed for cheating 29． How can Mettl help to get rid of cheating online? A． By equipping teachers with cameras. B． By asking test－ takers to sign in. C． By providing different tests at a time. D． By recording the test－ takers39。 behaviors. 30． The underlined word “ flags” in Paragraph 4 means “________”． A． notices B． reacts to C． changes D． marks 31． We can conclude from the passage that the technology of Mettl is ________ in the MOOC era. A． unreliable B． promising C． wasteful D． successful D Children whose mothers were exposed to higher levels of phthalates (酞酸鹽 ), which are mon chemicals in consumer products, such as raincoats and soaps, in late pregnancy (孕 期 ), tend to score lower than other children on intelligence tests at the age of seven, according to a new study. Researchers followed 328 New York women in low－ ine munities from pregnancy until their children were seven years old. When the children were seven, they pleted an intelligence test measuring four areas of mental functioning. The mothers39。 levels of two of the phthalates—DnBP and DiBP—during pregnancy were associated with childhood intelligence: as phthalate levels went up, the child39。s IQ tended to go down. “ With observational stu