1. Dr. Li is carrying out such an investigation in order to ____.

1. find out how smells regulate moods in a subtle and nuanced way
2. prove that smell plays an equally important role in daily life as that of sight and sound
3. find out if people are sensitive to faint smells
4. find out if faint smells could influence people's judgement of others

2. The mineral oil is used in Dr. Li's experiment to ____.

1. control the concentration of odours in a slightly detectable degree
2. act as a group of comparison with that of the other smells
3. regulate the participants' moods by decreasing the smell's concentration
4. protect the participants from losing sense of smell

3. The word "likeability" (Line 4, Paragraph 4) most probably means ____.

1. similarity
2. likeness
3. loveliness
4. likelihood

4. When the participants consciously smelt the valeric acid, they tended to ____.

1. make negative judgement to a face
2. make positive judgement to a face
3. make biased judgement to a face
4. make fair judgement to a face

5. From Dr. Li's experiment, it can be inferred that ____.

1. one's reaction to subliminal smells reflect useful information about his or her personality
2. subliminal smells can influence people's interaction with each other
3. subliminal smells have no effect on people's conscious face-perception
4. subliminal smells turn out to be a means of powerful manipulation in terms of business success

(Reference keys.)