阅读短文，按要求完成各题。
Close your eyes. Think about a happy memory. What do you see? What do you smell? Do memories smell? Haraid Vogt and Avery Gilbert think so. Smell and memory are very important to them. Why? They sell smells.
Who do they the smells to? And how can they sella smell? Businesses come to Vogt and Gilbert for help. Vogt and Gilbert find a smell to go with the business’s product. For example, Vogt and Gilbert worked with and expensive hotel in New York City. They developed a smell like expesive cologne(科隆香水)for the hotel’s owners. Then they put it in the air of the hotel hallway. Why did they choose the smell of cologne? A lot of businessmen stay at that hotel. The hotel’s owners want their guests(客人)to feel like they are in an expensive men’s club. And rich men wear expensive cologne.
Using smell to sell things is not new. Bakers know that the smell of baking bread brings in customers. They always make sure that people on the street can smell the baking bread. Chocolate makers do the same thing. And of course perfume (香水)makers sell smells.
In the past, only the food and perfume businesses used smell to sell their products. But today, more and more businesses are trying it, from hotels to airlines(航空公司). Some companies put a special smell on the advertisement that they send to customers. For example, one car company uses a perfume on their booklet that smells like a new car.
But do smells really sell? The answer seems to by yes. Smells become a part of our  memories. And memory is important in sales, why? When customers remember the name of a product, they usually choose it again. But there are a lot of choices these days, so it isn’t easy to remember product names. That’s why smell is important. It helps people remember.
In the future, will different computers and televisions have different smells? Vogt and Gilbert think so. They are sure that one day, most businesses will use smell to sell.
根据短文内容完成句子填空（每空限填一个单词）
From the first paragraph of the passage, we know Harald Vogt and Avery Gilbert sell ______ and they ______ memories smell.
根据短文内容完成句子填空（每空限填一个单词）。
According to the passage, smells are ______ for business because they can ______ people to remember the product names.
根据短文内容回答问题。
According to the passage, how did Vogt and Gilbert help the hotel owner’s business?
                                                          
把短文中画底线的句子译成汉语。
                                                             
根据短文内容用一个完整的英文句子（限10个词以内）回答问题。
What is the main idea of the passage?