"This is an extremely challenging insect.
"Financial services faces an extremely challenging operating environment," he said.
"However, despite the best efforts of staff, Feltham A remains an extremely challenging environment with extremely challenging children.
"That's an extremely challenging task, even for a skilled negotiator".
I'd like to offer you a job in an extremely challenging and rewarding field.
However, this is an extremely challenging time, in health and social care".
When Liam Fox became defence secretary in May 2010, he inherited an extremely challenging brief.
I'm very committed, but it's an extremely challenging language.
Proximal pole fractures and nonunions of the scaphoid present an extremely challenging treatment problem.
Management, storage, efficient access, and analysis of this data present an extremely challenging task.
"Being governor is an extremely challenging, stressful, yet often rewarding job," Governor Rell said in a statement.
