What did you encounter during your trip that made you feel particularly sorry?

I went to Shanghai to see the World Expo in my first year, leaving many regrets. At that time, I was particularly excited to sign up for the World Expo organized by the school. Nearly 30 people in the class signed up for other classes. A few days after the final exam, the school organized everyone to go together. On the first day, my parents and I went to the supermarket to buy a lot of delicious food and ate it on the train with my classmates. We also brought a popular card game "Three Kingdoms Kill" to play with our classmates on the train, but it was sent to school. I forgot to take snacks when I got off at the place where I put things above my seat. Although the school packed us a travel train, all the carriages were very happy for us, but all the things I was going to play with you on the train were gone, and I didn't play those things with you as I expected. It's really a pity, because there are no more opportunities for so many people to play by train together.

Then I went to Shanghai to see the World Expo. Because I didn't plan to make a travel guide at that time, I was an eye-opener when I entered the Expo Park. The teacher put us in the Expo Park and went to play by ourselves. Several other students and I are not familiar with the World Expo, which leads to our failure to go to some interesting pavilions. Besides, the Expo Park is too big, and I didn't visit the interesting landscape of the Japan Pavilion. It rained that day and I didn't bring an umbrella. Some large exhibition halls are too crowded. I took the wrong memory card of the camera again. I took a few photos, but I have no memory. Anyway, that trip was a trip full of regrets.