It is a common ____ to have a cake with candles to celebrate a holiday ,birthday or any other occasion.
Look , dark clouds are gathering. It is ________to rain.
People _______drugs have many difficulties in getting rid of the ______
________ to work overtime that evening, I missed a wonderful film.
Recently we have seen the film The Flowers of War, _______ are used in some restaurants to attract consumers.
______ we go to work every day is obvious, that is, for life.