题目内容：

    Do some kinds of video games cause violence? Scientific studies do not suggest a link. But the idea that there is a link between violent video games and violent acts reappeared following the mass shooting in El Paso, Texas, last weekend. An online statement thought to be written by the El Paso gunman mentioned the video game “Call of Duty”.

On Monday, President Donald Trump said that “terrifying video games” contribute to a “glorification of violence”. American politicians have long made similar statements. Benjamin Burroughs is a professor of media at the University of Las Vegas. He said that there is no linkage to gun violence, when mentioning video games. Burroughs pointed out that some studies show a short-term increase in aggressive thoughts and feelings after playing video games, but nothing that rises to the level of violence. “Plenty of gamers get upset when they lose or feel the game was ‘cheating’, but it doesn’t lead to violent outputs,” Burroughs stressed.

In 2006, a small study by researchers at Indiana University found that teenagers who played violent video games showed higher levels of emotional arousal（激发）—strong emotions like anger or fear. The teenagers also showed less activity in the parts of the brain associated with the ability to plan，control and direct thoughts and behavior.

Patrick Markey，the psychology professor，found in his research that men who commit severe acts of violence actually play violent video games less than the average male. Another study by Markey and other researchers showed that violence tends to go down when a new violent movie or video game comes out. One possible explanation is that people are at home playing the game or in theaters watching the movie. Markey believes that video games might excite people, but they do not change who people are. “It is like going to see a sad movie,” Markey said of playing video games. “It might make you cry but it doesn’t make you clinically depressed,” he said.

1.Why is the mass shooting in EI Paso, Texas mentioned in the first paragraph?

A.To show the necessity of scientific studies.

B.To support the writer’s own viewpoint.

C.To show the seriousness of violent acts.

D.To serve as evidence for the assumption.

2.What are the similarities between Benjamin Burroughs and Patrick Markey?

A.Both are specialists in psychology in the USA.

B.Both acknowledge video game roused emotional change.

C.Both present their ideas through doing research.

D.Both worry about the potential dangers caused by video games.

3.What can be learned about the research in 2006?

A.Teenagers tested in it become more emotional.

B.Its findings set alarm for young video game players.

C.Teenagers mentioned in it mainly come from Indiana.

D.Its researchers are strongly for banning video games.

4.What is the best title for the text?

A.Violence—a by-product of video games.

B.Video games—the cause of violence or not.

C.Video games—the promoter of the mass shoot.

D.Violence—a threat for game players or not.