I didn’t see her in the musical hall this evening. She_____ have sung at the concert. [ ]

You look_____. Why –I lost my ID card.

Mr. Li, who is said to have moved to Beijing, _____ at No. 4 Middle School in our city for thirty years.

Do you often take cold showers in winter—No. But I _____ when young.

下列划线词的词性和用法都与例句相同的一项是（ ）例句：项伯杀人，臣活之