The passage tells us that salesmen have __________.

A. discovered the relationship between color and psychology

B. tried out colors on blind people

C. found out that color affect sales

D. developed a special subject of color psychology

2. It can be inferred from the passage that ________.

A. what color we prefer depends on our state of mind

B. foods sell well in green or blue wrappings

C. blind people cannot sense color difference

D. a bright yellow has exactly the opposite effect to red

3. If people are exposed to(置身于) pure blue, _________.

A. their blood pressure rises

B. they want to taste blue foods

C. they will feel like buying things

D. they won’t easily feel nervous

4. The most effective color in the passage for warning people is _______.

A. red B. dark blue C. bright yellow D. green

5. Which of the following do you think is the best title of the passage?

A. Colors and sales B. Colors and feelings

C. The blind and colors D. Preferences for colors

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