She chose a guard near her and began to concentrate gently.

The groups press began to concentrate more on campus activism in the late 1940s.

In the 1970s, the foundation began to concentrate on democratic politics, particularly the role of citizens.

As of 1930, he began to concentrate on new music.

I put down my paper, and began to concentrate.

Dana began to concentrate on what lay ahead of her.

After her 16-year-old son died, Matthews began to concentrate on helping young people of his age.

However, despite their success he began to concentrate on portraiture.

Interested despite his own troubles, he began to concentrate on what they were doing.

Mercedes began to concentrate on the individual performances of the people she knew.