阅读理解。
Your smile is a sign of how you're feeling, and who you are. People with brighter smiles and white teeth
appear youthful, healthy, open to conversation and sure of themselves. A smile sends good messages about
yourself to others-it tells them you look good and feel good. A beautiful smile adds more to confidence than
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1. Why does the author talk about a person's smile in Paragraph 1?
[ ]
A. To explain the relationship between smiling and health.
B. To tell us the importance of white teeth while smiling.
C. To prove that a person with a smile has more chances of becoming a star.
D. To advise us to keep positive by smiling.
2. According to the author, the method of whitening teeth mentioned in the passage is _____.
[ ]
A. fast but expensive
B. easy but expensive
C. fast and easy
D. easy and cheap
3. If you aren't satisfied with the results after trying the teeth whitener, _____.
[ ]
A. you won't get any money back
B. you will get back double what the product has cost you
C. you will get back all your money
D. you have to explain the reasons
4. What can be inferred from the passage?
[ ]
A. Caffeine, red wine and soft drinks are usually bad for people's teeth
B. It takes at least a month to whiten your teeth.
C. People who appear healthy must often smile.
D. Most stars in the world often whiten their teeth.