[单项选择]Brushing your teeth regularly no matter which toothpaste you use, will reduce your chances of tooth decay. Scientists have concluded that when you brush, you reduce tooth decay by removing the film of plaque that forms on teeth and gums. So, you can forget about fluorides: brush your teeth carefully and say goodbye to cavities.
Which one of the following is a criticism of the reasoning in the argument
A. Brushing with fluoride toothpaste has been shown to reduce tooth decay.
B. The fact that brushing will reduce tooth decay does not show that fluorides are of no value.
C. Few people adequately remove plaque by brushing.
D. People have plaque on their teeth most of the time.
E. (E) Scientists have been wrong about fluorides.

[填空题]No matter what your situation is, one of the greatest dangers now is that you’ll stop doing what you’re already doing right.
66. ______.
The first fundamental is maintaining a clear-eyed view of reality, no matter how unpleasantly it may differ from what you expected. It’s amazing how many executives are driven by management fads and slogans, big hairy audacious goals (BHAGs), quantum leaps, inspirational leadership-and then refuse to deviate from course even when the environment changes dramatically.
67. ______.
As the economy slows, you need to wipe your whiteboard clean and rethink your strategy based on what’s realistically achievable.
We know of a major chemical company that in the recent era of super growth declared a goal of growing ten times bigger in ten years. It’s a wonderful aspiration, but it shouldn’t be the company’s focus now.
68. ______.
The second fundamental-like the others, it must be non-is to focus on the quality of

[填空题]Brushing and flossing can surely keep your teeth and gums healthy.

[单项选择]A Doctor in the House Brushing your teeth twice a day should keep the dentist away. But if a group of scientific researchers have their wish, it will make the rest of your body healthy too. (46) It is one of many gadgets proposed by engineers and doctors at the Center for Future Health in New York— others include a pair of glasses that help to jog your memory, and a home camera designed to check for cancer. The devices seem fanciful, but the basic principles are simple. The gadgets should make it easy for people to detect illness long before it strikes and so seek treatment far earlier than normal. (47) ________ In the long run, the technology may even prevent illness by encouraging us to lead healthier lives. Intelligent bandages are a good example. Powerful sensors within the bandage could quickly identify tiny amounts of bacteria in a wound and determine which antibiotics would work best. (48) ________ Socks are long overdue for a makeover. In the future they will be able to aut