1 . Directions: After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.

News From The World of Medicine

SHORT ON SLEEP? DON'T FORGET TO DRINK WATER

In a Pennsylvania State University study involving more than 20,000 participants, people who said they got only six hours of sleep regularly ran a greater risk of dehydration (脱水) than     1     who got eight hours. The reason might lie with a hormone (荷尔蒙) called vasopressin,     2     helps control the body’s fluid levels. It’s let out in larger quantities later in the sleep cycle,     3     people getting less shut-eye might not have the best amount of it. If you know you’re short on slumber,     4     (make) a point of drinking water.

TEN-MINUTE CANCER TEST

Australian researchers have developed a test     5     can discover cancer cells in ten minutes with 90 percent accuracy. Healthy DNA and cancer DNA, it turns out, stick to metal surfaces differently. When cancer DNA     6     (add) to water mixed with gold nanoparticles (纳米颗粒), the water remains its rosy color, when healthy DNA is added, the water turns blue.     7     the test is cheap and simple, it could be used at your primary care physician's office, with follow-up if necessary.

EXERCISE PREVENTS FALLS

Each year, at least a third of people     8     the age of 65 fall downwards. Research found that there's one factor related to notably reduced risk: exercise. People who took part in Tai Chi fell 19 percent     9     (often), while those who did balance and functional exercises, such as step-ups, chair rises, or standing on one leg, fell 24 percent less often. Most useful of all was     10     (combine) different types of exercise, including lifting weights and balance exercises.