He used to ______ cards, but now he is used to _______ a walk after supper.
--- Jack fell off the ladder yesterday, but he is all right now. ---What a lucky dog! He _________ himself badly.
_____ in a poor family made Jack very hardworking when he was still young.
To my mind, the secret to happiness__________ your successful work and your contribution towards others’ happiness.
Will you see to _____ that my children are taken good care of while I am away?
______ twice, the postman refused to deliver our letters unless we chained our dog.