In my opinion, you can widen the _____ of these improvements through your active participation. 

 If what you are teaching doesn’t _____ to your students, your students will gradually lose interest in it.

 It’s hard to imagine a large city without policemen, but such was the ______ in London in the early 18th century.

There is strong evidence that the          of a father increases the probability that a youngster will use drugs and engage in criminal activity.

The children have been playing with my hat ---they’ve knocked it out of _____.