假如你是李华，这个暑假参加了由21st Century英语报在北京举办的全国中学生夏令营活动。请根据提示，写一篇英语作文，内容包括：
1.参加活动的学生和专家人数，营员们必须用英语交流；
2.活动内容；
3.参加夏令营的体会。
参考词汇：营员camper
注意：1.词数100左右；
2.可以适当增加细节，以使行文连贯。

【考点】提纲作文．

【答案】This summer，I went to a two-week English summer camp which was held by the 21st Century English Newspaper in Beijing.
There were over a hundred middle school students from all over the country and thirty experts in English teaching participating in this exciting camp.It was required that the participants should speak only English with each other.Various activities were organized to improve our oral English skills，such as the national English debate for middle school students，English speech competition for middle school students.We also visited many places of interest.However，what impressed me most was the English party，in which some campers sang and danced in English.
We found it interesting to learn English in this way.This camp is a really life-changing experience that I will never forget.