Most challenging sequence was Courtship behavior, which happens one for single day in a year.

Evaluation and treatment can be very challenging in this patient population.

Set challenging targets to reduce water use - for example by 10 per cent in a year.

Changes to your body and routine can make breast-feeding more challenging in the first few weeks.

So, bang, you've got a challenging in the nest without ever knowing it.

There is a 9 hole golf course that has been considered one of the most challenging in the state.

This bit became more challenging for him in the 1987 season but he kept trying, even poking fun at himself.

"And we offer challenging course work in every area."

The current economic climate will make this year's campaign, which runs through Jan. 31, one of the most challenging in recent years.

Don't take on problem-solving conversations or challenging activities in the evening.