A、It helps to keep the eyes moist. B、It improves a person’s concentration. C、It prevents a buildup of chemicals in the eyes. D、I

W: Hi, Tom. How is your chemistry paper going?
M: It’s coming along. But I’ve been staring at this computer screen for hours and my eyes hurt.
W: Yeah. Doing that can make your eyes really dry and tired. You should take a break.
M: I can’t. I have to get this paper written. It’s due tomorrow.
W: You know I read about computers and eye problems recently. The article says that they are usually caused by not blinking your eyes enough.
M: Blinking? I thought I just needed new glasses.
W: No. When you blink, the movement of closing and opening your eyes, even though it happens really fast, helps moisten your eyes. It’s the lack of moisture that causes the problem.
M: That makes sense. But what does it have to do with the computer?
W: People who use computers tend to stare at the monitor and blink less often than they normally would. That leads to dry irritated eyes.
M: Well, that’s certainly how mine feel now. They really hurt.
W: I guess so.
M: I wonder if using some kind of eye drops will make them feel better.
W: That might help. But the best prescription is to take a break and rest your eyes.
M: OK. Let’s go get some coffee. I can finish this later tonight.
Questions 22 to 25 are based on the conversation you have just heard.
22. What did Tom think caused his eye problem at first?
23. What can we learn about Tom?
24. Why is blinking important?
25. What is the best solution to Tom’s problem?