15. —When Lily fainted, we could have turned to your father for help. —Yes, sending her to hospital _________ necessary.
It is __________ to spend money on preventing illnesses by promoting healthy living rather than spending on trying to make people ___________ after they are ill.
--- They are quiet, aren’t they? --- Yes.They are accustomed ____________ at meals.
--- Why do you suggest we buy a new machine? --- Because the old one has been damaged ___________.
It is often said that the joy of traveling is __________ in arriving at your destination ___________ in the journey itself.
-- It shouldn’t take long to clear up after the party if we all volunteer to help. --- That’s right._____________.