40
(A)when
(B)where
(C)what
(D)that

Packaging is an important form of advertising. A package can sometimes ____39____ someone to buy a product. For example, a small child might ask for a breakfast food ____40____ comes in a box with a picture of a TV character. The child is more interested in the picture than in the breakfast food. Pictures for children to color or cut out, games ____41____ on a package, or small gifts inside a box also make many children want to buy products—or to ask their parents for them. Some packages suggest that a buyer will get something for ____42____ . Food products sold in reusable containers are examples of this. ____43____ a similar product in a plain container might cost less, people often prefer to buy the product in a reusable glass or dish because they believe the container is free. However, the cost of the container is added to the cost of the product

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