Work in pairs. Read and say how old the ancient Greek theatre is. Since we all live in AD or CE (Common Era) years now, there is no need to say "AD", it is understood. So, it is 2020 AD, but all that you say is 2020. If you have a date in BC or BCE (Before Common Era) and you want to find out how long ago it was, you just add it to the current year. So, if we want to know how long ago 1000 BC was, it was 3020 years ago (2020 + 1000 = 3020).​

I use WhatsApp every day. And I consider it the best.

It has helped me out more than once when traveling, when you can use Wi-Fi to call, send photos. Yes, you may say that all this can be done via Skype, but I don't have a front-facing camera on my phone and the meaning of such communication is lost.

And via WhatsApp, you can send your own voice recorded in a message, a video from a vacation, or those events that you want to share with someone else. For example, my brother sent me a video from the wedding via WhatsApp. And in communicating with relatives from Poland, this is generally super, because the difference in time zones does not allow you to communicate often on Skype, and so you can constantly keep each other up to date with all events.

In addition to such photo messages, this is of course the usual correspondence. Long days, nights, and days. Most often I communicate with close friends and relatives.

On the account of calls, for some reason, when you talk for a long time, the connection is constantly interrupted and you constantly have to call back.What else I really like is the privacy of conversations. And the fact that the app is absolutely free!