1) Listen then repeat to practise accentuation and pronunciation. Occasionally record yourself and compare with these sounds coming from 'http://www.yourdictionary.com/'
accidental
o o O o
athele
O o
Australia
o O o
australian
o O o
catastrophe
o O o o
chocolate
O o o
conscientious
o o O o
congratulations
o o o O o
especially
o O o o
humorous
O o o
immediately
o O o o
parenthesis
o O o o
pronunciation
o o o O o
question
O o
questionnaire
o o O