raduated from college at a very young age—Oh,he ______ have been a very smart boy then

I hear that Lily’s brother is a worker here.—Look! The manisworking over there is her brother.

How does he go to Hong Kong —________.

hat information ____, I sought out Douglas Smith, director of the Center forBrain Injury and Repair at the University of Pennsylvania.

His hard work paid ____ when he got the result