根据下面资料，回答题 Sell， Sell， Sell Last year over ε 13bn was spent on advertising in the UK and research indicates that most people will have seen 2m sales messages by the time they are 30. Advertising is big business and often acts as the interface between commerce and culture. While there are many adverts that just irritate， there are some that are miniature works of art. （0）.. G... The advertisers themselves believe they are delivering an important message because they are protecting and promoting a client's brand and extending greater choice to the consumer. （8）Instead of being free， many TV channels would only be available on subscription packages of about ε 500 per month and newspapers might cost six times more than their present cover pdce.There are many different models of advertising practice， but no one is precisely sure what makes a good advert. （9） While some try to get you to buy a product， others， such as anti- smoking campaigns， aim to get you not to do something. Some adverts are not aimed at consumers at all， but at retailers， shareholders or employees. For example， manufacturers often advertise their products in trade magazines to reassure retailers that a new brand will be widely promoted. Petrol companies often choose to emphasize how environmentally friendly they are; this is to offset any negative public perceptions of the industry rather than to persuade consumers to buy an individual brand of petrol. （10） This is because petrol is regarded， in advertising terms， as a distress purchase. We get it because we can't do without it， not because we really want it. In general， however， the main aim of advertising is to attribute emotional qualities to a product in order to create an individual brand that the consumer can associate with. Working out whether an advert has been successful is extremely difficult. （11） For example， what persuaded them to buy a car? You cannot be sure whether it was the advertising， the price， the opposition's distribution， changes in the law or changes in consumer attitudes that was the determining factor. What advertising can't do is make consumers buy something they don't want. It can perhaps persuade you to try something once， but if you don't like what you get， you won't try it again， （12） In other words， where there is no emotional engagement， such as a consumer's feelings about a bag of peas， beliefs are much harder to shift.