22:When I asked my students to practice holding a conversation in class, they looked confused. What's worse, my students 21.() hard in this class activity. I came to realize thatcultivating in students the ability of communicating with each other in real time has been 22. () in the current education. Face-to-face communication is probably the most important skill in the 21st century. It is a(n) 23. () a skill indispensable for job interviews, pay raise negotiations, project discussions, and making life decisions. However, students' 24. () on smartphones for communication is making it difficult for them to engage in face-to-face talk. The strong push for screen use in schools has also led to 25. () consequences. It prevents students from developing the ability of 26. () thinking. It also dumbs down their communications, even on the most important matters. Now that technology has an important 27. () on students' lives, probably we could take advantage of digital devices to help students regain the lost art of face-to-face conversation. I have noticed that students take conversations, debates, and discussions more 28. () when recorded. We can encourage students to 29. () a balance between digital literacy and interpersonal conversation. In this way, students will be able to learn to maintain 30. () conversation.

答案：B