They discussed about math problems just now.改为同义词
问题描述：
They discussed about math problems just now.改为同义词
They------- --------- ------- about math problems just mow
答
They（had）（a）（discussion） about math problems just mow.feel是感官动词也是系动词，那系动词后加形容词，修饰动词用副词。那么feel后到底接adj还是adv