1. Complete the following text by changing the verbs in parentheses into the Simple Past tense?

I want to tell you about Skype, an amazing invention I discovered when I first traveled abroad.

It is a free software application that allows you to communicate with people by voice, video and instant messaging online.

Its original name was Sky Peer - to - Peer.

Janus Früs and Niklas Zennström created Skype in Estonia.

They invented it in 2003.

Years later, they also developed a very popular Internet TV service called Joost.

I think Früs and Zennström definitely changed the nature of peer - to - peer communication and content distribution around the world.

Hope this help you.