1.   Greg has a keen mind.

2.   With her keen mind and good business sense, she soon became noticed.

3.   At his best, he demonstrates a keen musical mind and an unfettered kinetic imagination.

4.   But he is a stubbornly persevering, duty-driven cop with a keen if idiosyncratic mind for crime solving.

5.   But his laid-back manner and keen musical mind grow on one the way a persistent vine grows on a tree.

6.   He has a keen mind and instinctively understands the Washington scene.

7.   He is a highly educated liberal with a keen mind, and once again, as our argument grew more intense, I found it impossible to keep up.

8.   His folksy manner masked a keen legal mind, a fiercely competitive streak and a relentless faith in the efficacy of punishment.

9.   I have friends in both those businesses -- fine people, with keen minds and amazing command of a wide range of issues and interests.

10.   In real life, singlehood, like war, requires a keen strategic mind that sharpens with experience.