He put the problem out of mind and concentrated on the work at hand.

He shrugged mentally and concentrated on the business at hand.

He pushed the thought aside for another time, and concentrated on the business at hand.

Concentrate on the task at hand, which is contributing to profit today.

Trying to clear his mind, he concentrated on the task at hand.

With an effort, he left his emotions behind and concentrated on the task at hand.

Trying to ignore his own emotions, he concentrated on the task at hand.

Gathering herself together, Jen concentrated on the matter at hand.

For the time being, though, Jenn and others concentrated on the problems at hand.

Instead, he concentrated on the task at hand, getting the Investigator to a place of safety.