1.   I tried hard to concentrate, but my mind kept wandering.

2.   I was sticky with mud, and my mind kept going over and over the extraordinary events of the afternoon and evening.

3.   I was trying hard to concentrate, but my mind kept wandering.

4.   Jean tried to concentrate as he went on with his list of symptoms, but her mind kept wandering elsewhere.

5.   Thus some minds for ever keep trimming boat.

6.   His mind kept flashing back to the previous night.

7.   I always thought I was the philandering type, but my mind keeps going back to her.

8.   Her mind kept wrestling with the problem of her identity, her imagination running riot as she pictured loved ones mad with anxiety about her.

9.   But his mind kept drifting back to last summer in Millington, Tenn.

10.   His mind should keep rewinding and replaying the crime until he is forced to scream its reality to someone, purging his sin, righting the world again.