Đáp án:

About fifty students in two schools in Ha Noi, Viet Nam and Umea, Sweden have been exchanging letters in a penfriend project since 2013. ‘I love to write. You can even stick something on the letter, like this tiny sweet!’ said Linh, from Ha Noi about the project. From the Sweden end, Anders said, ‘It’s so nice to open and read real letters!’ But will this be our future communication? It’s said that in a couple of decades we’ll be using telepathy and holography.

Nowadays, we can meet our friend face-to-face, using signs, call by phone, you name it.
Telepathy uses a tiny device placed into our head. Information will be sent and received directly to and from our brains. We’ll be communicating just by thought over the network! Holography, a video-conference technology with three-dimensional images, will help us interact in real time in completely different places.
Impressed? Maybe, but not everyone thinks the cyberworld will replace the real world. Like the children in the penfriend project, I prefer to chat with my friends over a cup of tea and enjoy their company - life is more meaningful that way!

Giải thích đáp án: 

In the past:...

Now:....

Future:...