Some doctors are criticized for _____ patients to buy too many medicines.
It was dark and cold. They had to find a house ____ and some wood ____.
The house built of stone lasts longer than ____ built of wood.
It is ______ that terrorism is a great threat to world peace.
With the worldwide oil crisis, the price of oil has been raised ______ 15%.
Part of the work is to be finished today and ______ by this weekend.