В шахматном турнире участвовали 7 человек. Каждый с каждым сыграл по одной партии. Сколько всего партий они сыграли?

Всем привет! Переведите пожалуйста текст(не используя переводчик).Заранее спасибо!

                                                                       Pets

A lot of teenagers keep pets at home. Some of them are very common. Duncan’s pet is a budgie. Its name is Whipper the Budgie. Duncan likes his bird very much. He often watches it flying around the house. Duncan always laughs when he sees Whipper dance in front of the mirror. One morning when Duncan was still asleep he felt Whipper’s beak touch his lips and heard his bird say loudly “Hel­lo!”. Later Duncan noticed Whip­per say “Goodbye”. Now there are several words in Whipper’s vocabulary. Some people buy danger­ous animals as pets; crocodiles for ex­ample. In Florida you can see a young man walking a crocodile! In Canada one family keeps a buffalo as a pet. They call him Buffalo Bailey and love to watch it running on the farm ground. Julia Lloyd has a pet that can change the colour of its skin. Have you ever heard of such animals? They are chameleons. They are very beautiful but they are not easy pets. Julia often watches her pet changing the colour of its skin and climbing the tree in its big cage. Have you got any pets at home? What are they like? Do you think that any animal can make a good pet?