Welcome to the unit Do these advertisements attract your attention? Why or why not?Where can we get advertisements?Why do companies advertise? Discussion There are two basic types of advertisements.Commercial Advertisement (CAs, 商业广告 )Public Service Advertisement (PSAs, 公益服务广告 ) Read and enjoy the following advertisementsand decide which are PSAs and which areCAs. Earth Day Every Day No business too small,no problems too big. (IBM) Obey your thirst. (Sprite) There is hope for us all. The new digital era. We have only one earth. Just do it. Feel the new space. Say “No”to drugs! Go through the pictures in your booksand discuss these following questions:1.Which ads make you want to buy a product or service? Why?2.Which ads make you think about problems in society or about people who need help? Why?3.Do you believe that ads tell the complete truth? Why or why not? Thank you for your kind attention!