One possible version：
Great changes have taken place since the 1970s in the way senior high school students celebrate their graduation and remember the memories of those days with their classmates. In the 1970s，students then rarely gave each other gifts，but instead wrote farewell poems or short messages to express their feelings and extend their congratulations. During the 1980s，however，they began exchanging graduation gifts such as pens and notebooks，and started taking group photos. With the Internet being a popular means of communication nowadays，students join online alumni communities and share photos and diaries. They also make DVDs of their graduation ceremony and outdoor celebrations.
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