in the reading room,we found her ___at a desk,with her attention ___on a book.A:sitting,fixingB:to sit,fixedC:seating,fixingD:seated,fixed为什么？并且sit和seat之间有什么区别？

in the reading room为什么用reading in the reading room 中的reading是什么成分啊?类似还有dining room之类的. Please read the book ------(quiet)in the reading room we must obey the r___ in the reading room Someone is reading in the room.(改为一般疑问句) ____ ___Someone is reading in the room.(改为一般疑问句)____ ____ reading in the room. It's r____ to speak loudly in the reading room.. she is reading in the room (is read提问） You must not eat in the reading room.改为祈使句 You should be quiet in the reading room They can't _____(are) in the reading room. don't talk so l( ) in the reading room Don't talk ____ (大声地) in the reading room we mustn'ttalk loudly in the reading room 同义句 Everyone s____ keep quiet in the reading room. You must keep s_____ in the reading room Plese keep ______(quietly) in the reading-- room. room don't the in talk reading .(连词成句 we must (be)quiet in the reading room.