最近你參加了學校舉行的"21天好習慣訓練營"（21-day Habit Building Camp），請你用英語寫一篇短文，介紹你參加活動的情況。內容包括：
（1）活動的時間、地點；
（2）活動的內容（每天打籃球、跑步等并分享朋友圈）；
（3）你的收獲。
注意：
（1）詞數100左右；
（2）可以適當增加細節，以使行文連貫。
參考詞匯：朋友圈Moments

【考點】提綱作文．

【答案】Last month， I participated in an activity organized by the school.
From December 1 to December 22， my school held an activity named 21-day Habit Building Camp. The activity was held on the school playground. This activity includes a lot of interesting content. First， each participant must choose a sport he likes， such as playing basketball， running and so on. He should insist on completing it every day， and finally he should share it in the Moments.
In the past 21 days， my body has become stronger. I have made many good friends， and the most important thing is that I have developed a good exercise habit.