—Is there anything wrong, Bob? You look sad.—Oh, nothing much. In fact, I __________ of my friends back home.
_____ 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.
_____ for the free tickets, I would not have gone to the films so often.