【推荐1】So there is a Keep Fit Summer Camp in our city. In the camp, the overweight teenagers can take enough exercise and have a healthy diet. (用合适的连词合并成一句)
→______________________________________________________________________

【推荐2】你需要坚持的是每天早晨进行充分的体育锻炼。(动词不定式作表语)
What you need to insist on is ________________.

【推荐2】警察有责任和义务维护公共秩序和安全。
The police ________the preservation of public order and security.

【推荐3】我们班由50名活泼的男孩和女孩组成，刘老师对我们每个人都很严格。（一句多译）
①Our class ________, and Mr. Liu is strict with each of us.
②50 lively boys and girls ________, and Mr. Liu is strict with each of us.