I think you owe me an [?] (=you should explain to me) .
Winston is not someone who accepts [?] easily.
Earthquakes are [?] difficult to predict.
They are doing [?] to learn more about the affects of alcohol on the brain.
An international agreement restricts the [?] of missiles.
We all to some [?] remember the good times and forget the bad.
He's a world [?] on marine mammals.
Air bags are a standard [?] in most new cars.

Paul's an easy-going sort of [?].
What's your [?] color?
Have you [?] the cat?
The rise in crime is mainly due to social and economic [?].
Could you get an [?] loaf of bread?
I don't like it when men I've just met are too [?].
Management have agreed to [?] the deadline.
I still have [?] in him.

Choose from: experiment, expert, explanation, export, extend, extent, extra, extremely, factor, failure, faith, familiar, favorite, feature, feed, fellow