room

　　It is important to give children room to think for themselves. She roomed with Mary in college for two years.

　　room在教材中作可数名词用时,意思为“房间”;作不可数名词用时,意思为“空间”。

　　上面两个句子中,第一个room作不可数名词用,意思为“机会”;第二个room作动词用,意思为“租房,合住”。