I'm going to give a talk about…(тема). …(тема) is/are a very important thing in everyone's life. As I know, … (точные развёрнутые ответы на 3 аспекта, данные в задании. На каждый аспект составить 3 предложения. Используй коннекторы типа besides, you know, As for…, More than that, I strongly believe that …) In conclusion I would like to say that … (тема) is useful, interesting, exciting because … (I think, it would be great if we could help … (тема)). That's all I wanted to say.