B another two cakeS 表示另外的两个蛋糕 two more cakes=another two cakes A少个S C没有这种用法 所以选B
望采纳呀大哥哦 可不可以再问你一个问题the teacher told Sally that she mustn't talk in class改为同义句就是the teacher asked Sally(not to talk in)class为什么这样改啊，ask sb not to do sth意思是叫某人不要去做某事， she mustn't talk in class意思是她禁止在课堂上说话，这两句话意思差不多，所以为同义句也不错，你也可以说the teacher told Sally that she cann't talk in class 都可以，同义句的该法有很多呢。