The GazeSpeak app combines a smartphone's camera with artificial intelligence to recognize eye movements in real time and convert(改变) them into letters, words and sentences.

　　For people suffering from ALS(渐冻症), also known as motor neurone disease, eye movement can be the only way they are able to communicate.

　　"Current eye-tracking input systems for people with ALS or other motor impairments are expensive, not robust under sunlight, and require frequent re-calibration and substantial, relatively immobile setups," said Xiaoyi Zhang, a researcher at Microsoft who developed the technology.

　　"To mitigate the drawbacks...we created GazeSpeak, an eye-gesture communication system that runs on a smartphone, and is designed to be low-cost, robust, portable and easy to learn."

　　The app is used by the listener by pointing their smartphone at the speaker. A chart that can be stuck to the back of the smartphone is then used by the speaker to determine which eye movements to make in order to communicate.

　　The sticker shows four grids(方格) of letters, which each correspond to a different eye movement. By looking up, down, left or right, the speaker selects which grids the letters they want belong to. The artificial intelligence algorithm(程序) is then able to predict the word or sentence they are trying to say.

　　25. What does the underlined word "mitigate" in paragraph 5 probably mean?

　　A. Ignore B. destroy

　　C. Increase D. reduce

　　26. The passage mainly tells us ________.

　　A. The advantages of Gaze Speak over the Current eye-tracking input systems.

　　B. Smartphone App helps ALS suffers speak with their eyes movement.

　　C. The sticker plays an important role in Gaze Speak.

　　D. The writer is making an advertisement for Gaze Speaker.

　　27. What's the writer's attitude towards the invention of Gaze Speaker?

　　A. doubtful B. negative

　　C. favorable D. unclear

　　Most people have had songs stuck in their heads at some point. The scientific name for this is involuntary musical imagery (INMI), which simply means that the people do not choose to keep the songs in their heads. Experts have nicknamed this condition "earworm" even though it is not an actual worm, and it does not take place in the ear. Rather, it takes place in the memory centers of the brain. It occurs when a catchy tune "sticks" in a person's mind. What makes a song stick depends on the individual. Some people get stuck on their favorite songs, while others end up fixated(念念不忘的) on songs they find annoying.

　　Nobody knows exactly why, a particular song gets caught in a person's brain. It can be brought on after recently hearing a song, or it can be started by a memory. Although earworm can happen to anyone at any time, certain people are more likely than others to suffer from it. Most commonly, musicians experience it, but people who simply listen to music more frequently than others are also more prone to(倾向于) earworm.

　　No evidence has proven one effective cure, but anything that disturbs the brain can help. The best way to shift the brain is to occupy it with a new activity. For example, actively chewing gum might switch the brain's focus from the repeating song to the moving jaw. Engaging in a task that requires concentration can remove the annoying earworm as well. However, if the task requires too much effort, it can actually make the earworm last, because the mind tends to wander to escape the difficulty of the job at hand.

　　While earworm can be very annoying, there is no evidence that suggests it is actually harmful. In fact, some experts are studying earworm to see what they can learn about memory centers. After all, these songs repeat automatically with no effort. What if science could apply this information to learning? What if everyone could learn new things without having to try so hard? If scientists can figure out how to tap into this type of memory, learning might look different in the future.

　　28. Which description is right about earworm?

　　A. It is shaped like an insect in the ear.

　　B. It results from listening to amazing songs.

　　C. It is a nickname for a disease called INMI.

　　D. It is a condition happening in one's brain.

　　29. Who is more likely to suffer from earworm?

　　A.A brain scientist. B.A retired physicist.

　　C.A famous painter. D.A pop music fan.

　　30. Which of the following activity can stop earworm effectively?

　　A. Reflecting on the song. B. Going on listening to a song

　　C. Enjoying a tasty snack. D. Solving a hard math problem.

　　31. What can be inferred from the last paragraph?

　　A. Earworm may make learning less painful.

　　B. Earworm has little to do with memory.

　　C. Earworm can be cured by the scientists.

D. Earworm does more good than harm.