----“This book is ______ more useful for us students.”----“Yes, but it is _______ too difficult.”

He gave me some very _____ advice on buying a house.

He is perfectly __________ to live in the mountains and paint pictures all day, even though he is of poor health.

The witness was expected to give the police a           description of what had happened, but he was too scared to do any help.

Having worked nonstop for three hours in the sun, John returned home, ______.