A、By exerting a negative influence on study. B、By arousing students’ interest in different speeches. C、By helping students learn

While many parents and teachers complain that video games are a waste of time, they are walking past a historic opportunity.(19)The only thing being wasted here is the true value and potential of these technological games. Instead of blaming them, we could be using these to create a revolution in education and training.(20)These games take our kids into a highly attractive world where they learn many things, such as operating vehicles, weapons and other machines. They pour hours into memorizing elaborate plots and developing the most sophisticated strategies and tactics to accomplish goals and win the game. And they don’t do all this alone. Often you’ll find them working with teammates from all over the world. Anyone who has ever tried to teach a kid how to multiply knows how hard that job is. But the games can make teaching these basic subjects become both efficient and effective. It is good to both learning and teaching.(21)Let the games teach kids about the parts of speech and free the teachers to help kids learn how to put those parts of speech together into something that has depth and meaning. Let technology teach our kids how to add and subtract and do basic algebra, and then pair them with some creative human teachers to sink their teeth into using that math to solve real problems—like how to balance our national budget.(22)Free our teachers to do what they like to do in the first place, instead of losing their love of teaching. Even as we make education genuinely fun and engaging for our students via the games, we can do the same for our teachers.
19. What is the true value of video games?
20. According to the passage, what is the benefit of playing video games?
21. How can the video games affect students’ study?
22. What will video games do for teachers?