He is a           boy.

The policewoman believes that Derek gave a reasonably _______ account of what had happened to the poor family during the robbery.

Don’t believe in those ads that you can master a language in one month. Instead, it is a(n) _______process, which may last for years. 

House prices keep rising these days. A flat in our city costs ____ now as in 1990.

The prisoner of war wished to be _________. Ten years later, he ____ and went home.