单选题Questions 9 to 12 are bused on the
conversation you have just heard.
单选题
A. In the wrong hands, teeth whitening can cause permanent dental
problems.
B. In the inefficient hands, teeth whitening can cause permanent dental
problems.
C. In the bad environment, teeth whitening can cause permanent dental
problems.
D. In the bad methods, teeth whitening can cause permanent dental
problems.
【正确答案】
A
【答案解析】[解析] 9-12
M: {{U}}It may be a treatment for that perfect smile, but in the wrong hands, teeth whitening can cause permanent dental problems. (9){{/U}}
W: The investigation by SKY news has found some chemicals being used in beauty salons by technicians with as little as one day's training.
M: That's horrible! They have so little training. It definitely kills our teeth.
W: It's illegal to sell hundreds of products, so what are we paying for? ...
M: {{U}}But the Department of Health considered teeth whitening as dentistry. (10){{/U}}
W: Yea, that's weird.
M: {{U}}The General Dental Council says giving instructions on dental procedures also falls foul of the act. (11){{/U}}
W: What's the dental procedure?
M: Tooth bleaching done properly is a dental procedure; you have to put your hands in the mouth.
W: Put hands in the mouth? That's not comfortable!
M: True. It is found that clinics use the chemical more commonly found in industrial cleaner.
W: Not only food safety problem! There is simply nothing is safe in this world.
M: The British Academy of cosmetic dentistry said it's highly acidic and it can dissolve the tooth surface causing permanent damage.
W: But in the Smile's Bar in Liverpool Street Station, it was told it was safe.
M: So we should do something to prevent the trade.
W: {{U}}Hope trading standard will bring accusations against clinics that break the law. (12){{/U}}
9. In what way will teeth whitening cause permanent dental problems?
问，牙齿美白为何会对牙齿造成永久性的损伤?由对话中男士的第一句话可知，如果交到错误的手中就会造成这种损伤，这其实就是说不合格的医生或专业人员所带来的危害。所以此题答案为A。
单选题
A. The Department of Health considered teeth whitening as a way to absorb
many people.
B. The Department of Health considered teeth whitening as dentistry.
C. The Department of Health considered teeth whitening as a way to protect
people's health if proper guided.
D. None of the above.
【正确答案】
B
【答案解析】[解析]
Why didn't the government ban the teeth whitening?
问，政府为什么不禁止牙齿美白?对话中男士直接指出，政府不禁止牙齿美白是由于医疗部认为这是一个产业。所以答案为B。
单选题
A. Instructions on dental procedures are given.
B. Instructions on clinical procedures are given.
C. Instructions on charge procedures are given.
D. Instructions on face procedures are given.
【正确答案】
A
【答案解析】[解析]
What will the foul act of teeth whitening be eliminated suggested by the General Dental Council?
问，牙科总理事会建议如何消除这种违规做法?对话中男士指出，要给出牙科程序的指示，才能消除这种违规做法。所以此题答案为A。
单选题
A. Trading standard.
B. Dental standard.
C. Doctor standard.
D. Ethnical standard.
【正确答案】
A
【答案解析】[解析]
What will prevent clinics from using chlorine dioxide?
问，什么可以阻止诊所使用二氧化氯?对话中提到了贸易标准，牙科诊所如果不加以遵守，将会被起诉。所以答案为A。