题目内容：

    The next time you need to get somewhere, you may be able to follow your nose. A study has found that a strong sense of smell is associated with a strong sense of direction.

Researchers conducted an experiment at McGill University in Canada. Fifty-seven adults were invited to participate in a virtual"way-finding task"in which they had to make their way around a virtual environment. They were given 20 minutes to learn about the virtual city. After having passed by each of eight landmarks at least twice, the participants were placed in front of one of the landmarks and asked to find the most direct route to one assigned by the researchers.

The participants also smelled 40 scented（有香气的）pens one at a time. After a brief sniff, the participants chose one word that best identified the smell from four words on a screen.

An additional exercise used a virtual maze（迷宫）to determine if the participants were more likely to rely on landmarks to find the way or if they used a more habit-based method built over time as people travelled the same route over and over again.

What the researchers found was that those with the ability to correctly identify the smells of the pens also had the easiest time performing the way-finding task by way of landmarks. A strong sense of smell was not identified in the participants who used the more habit-based method.

The connection between the sense of smell and way-finding likely came about as a result of the evolution of the nervous system. The original function of the sense of smell in humans may have been intended to support our spatial memory.

Keep that in mind the next time you get lost going to the dentist. It won't prevent you from getting horribly lost, but it's good food for thought along the way.

1.How did the researchers carry out the study?

A.By using typical landmarks in a real city.

B.By combining virtual tests with real-life tests.

C.By testing different senses in a virtual environment.

D.By collecting routine observation data from the participants.

2.What were the participants asked to do after they smelled a scented pen?

A.Decide whether they liked the smell.

B.Use a sentence to describe the smell.

C.Choose a suitable word for the smell.

D.Find the landmark that featured the smell.

3.Which of the following factors is better related to a strong sense of direction according to paragraph 5?

A.The way of using landmarks.

B.More experience in describing things.

C.Quick adjustment to the virtual world.

D.A more habit-based way-finding method.

4.The meaning of the word "spatial" underlined in Paragraph 6 relates to _____.

A.the situation B.the position

C.the spirit D.the time