As we know, every four years athletes from all over the world compete ____ medals in the Olympic Games.
Don’t mention that at the beginning of the story, or it may ______ the shocking ending.
It’s better to express your anger ______ bottle it up.
--- Did you return the book you borrowed from Tom?--- Yes, I gave it to him ______ I saw him.
---How did you _____ the old valuable house?---It used to be _____my uncle. He left it to me in his will.
Many of them turned a deaf ear to his advice, ________ they knew it to be valuable.