如何使用 "class" 造句

1. The class has elected its leader .
这个班选出了他的班长。
2. Classes are declared with the keyword class .
类可以用关键字class来声明。
3. Danny had fun with his class records .
丹尼因他们的班级记录而快乐。
4. Herein lies the problem culture and class .
这就是问题所在文化和阶层。
5. Why should the middle class encourage growth ?
为什么中产阶级应该推动经济增长?