Parents try to _______ their children of their bad habits.

The rise in wood fuel(燃料) use has __________ the disappearance of forest and the loss of habitats for pandas..

 He was unable to ________ to the students what he meant.

In their efforts to persuade us to buy that product, shopkeepers have made a close study of human nature and have_______ all our little weaknesses.

—Recent pressure at work may ______ his behavior.