听短文，根据所听内容和思维导图补全短文。

My name is John. We talked about our unforgettable memory in class . Tom said, "I will never forget the I had by the sea with my friends." Peter said that being a volunteer was an unforgettable memory. He had helped the foreigners in an  class. He thought it was very meaningful and interesting. Jack said his memory was  Disneyland. He had had a good time there. My unforgettable memory was going to  as an exchange student. I learnt a lot from this experience. We really enjoyed this class. How happy we were!