Not too long ago, many children enjoyed reading a good book in their spare time. Nowadays, teenagers are more likely to be seen playing video games or watching television. Some people even say they can't go without watching their favourite TV programme. Similarly, sending letters has become a thing of the past. It has been replaced by email, immediate messaging and other social media (媒体）.I think this is a huge shame； for me, there's nothing better than receiving a letter in the post. It shows someone has taken the time to sit down and write something； this is much more private than a conversation online. And for some people， especially the old, new ways of communication aren't so easy to use. I often send letters and postcards to my grandma to tell her about my life in France.

The presence of social media has, in some ways, turned us into anti-social beings. Instead of meeting up with friends and seeing them face to face, we now spend a lot of lime communicating online. Although online communication has its advantages — especially，enabling us to keep in touch with loved ones in different countries, we shouldn't forget the value of real-life human interaction. It is, after all, in our nature to socialize with others！ Admittedly (诚然)，I spend a lot of time using technology. I depend on the Internet and my laptop to plan lessons for my classes. I use wifi on my phone to send messages via apps such as Viber and Snapchal. Even so, when I'm on holiday it is nice to turn it all off and have a break. Taking a break from technology is setting yourself free.

48. The phrase "addicted to" in Paragraph 1 probably means ― ___________ ―. A. skillful at B. interested in

C. dependent on D. disappointed at

49. What does the writer think of sending letters?

A. It wastes a lot of time and energy.

B. It's something out-of-date and shameful.

C. It's a better way to communicate with relatives.

D. It's a more personal and caring way of communication.

50. From Paragraph 4 we know that the writer thinks .

A. social media makes people separated and lonely

B. it's important for people to communicate face to face

C. people have better skills in communication because of social media

D. online communication has more advantages than real-life communication

51. What's the writer's purpose of writing this passage?

A. To direct people to spend free time properly.

B. To remind people to make reasonable use of technology.

C. To encourage people to take full advantage of social media.

D. To advise people to communicate with each other more often.