29. After playing a violent video game, a person is more likely to be ______.

　　A. concentrative

　　B. impulsive

　　C. calm

　　D. tired

　　30. What does the underlined part “more profound” in Paragraph I most probably mean?

　　A. Greater.

　　B. Shorter.

　　C. More negative

　　D. More positive.

　　31. Which of the following can be the best title for the text?

　　A. What Causes Children to Be Violent

　　B. How Matthews Carried Out His Study

　　C. Say “No” to Computer Games

　　D. How Playing Violent Video Games May Change the Brain

　　D

　　More and more comments sections are being shut down online.

　　Autumn Phillips had had enough. On Aug. 19, the executive editor of the Quad-City Times in Iowa, and Illinois, US visited her website, qctimes. Com, and saw a story about a man who had been shot to death. When she got to the readers’ comments section at the end, she was shocked by what she saw. Below the story was a growing string of comments — a racist remark about democratic(民主的) voters, a negative comment about police… So Phillips decided to do something she had been thinking about for a long time: she shut down the comments section.

　　Phillips was not alone in making such a move. Last week, NPR announced it too was closing its online comments section. The decisions don’t mean that the news outlets are no longer interested in what their audiences are thinking. Both stressed their eagerness to hear from readers and listeners on social networks. But both agreed that comments had deviated from their original intention. And so they had.

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