Many young people become interested in playing ______ football because of the World Cup.

As we know, paper is made ________ wood , that is to say wood is made ______ paper.

Lanmon _________ here for almost ten years and he has many Chinese friends.

David talked with a friend of ________ on the Internet for a long time yesterday.

We have found no debris（残骸）ofthe missing Malaysian airlines flight in the waters