The boys           when the teacher came in. So she was very angry．

A．were doing homework

B．were cleaning the classroom

C．were fighting

D．were learning English

下列关于快速报表的叙述中，正确的是 ______。

A．快速报表就是报表向导

B．快速报表的字段布局有3种样式

C．快速报表所设置的带区是标题、细节和总结

D．在报表的细节带区已添加了域控件，就不能使用快速报表方法