Ответ:

Hello my dear
friend!

I was
very glad to receive your letter. Yesterday I forgot my phone at home. It was a
tragedy for me! Can you imagine how I depend on this digital. I use it every
day: to call somebody, to receive calls from somebody, to listen to music, to
use it as a torch, to play games, to take photos, to chat on the Internet, use
it as an alarm-clock , to use it as a USB , to use it for taking notes and so
on! So many things I can do with it! I can’t imagine my life without it! Of
course there are some other digitals which are important for me. It is a  computer which helps me to do my homework. And
 TV which helps me to relax and find out
something new. What about you? What digital do you find the most important for you? 

Bye-bye.

Yours, pen friend.