In the West, some people believe that personality can be predicted according to the blood type     1     the person was born with. People with blood type A, for example,     2     (consider) more likely to be serious, hard-working, and quiet, while people with blood type O are likely to be popular and outgoing, yet often unable     3     (finish) what they start. Though this belief continues to be strong, some people question whether it is true.

The blood-type personality theory     4     (start) in Japan in 1927 when Furukawa Takehi noticed personality similarities and     5     (different) among his workers. This idea soon went out of fashion,     6     it was brought back by a Japanese television host named Toshitaka Nomi in the 1970s. The belief is still strong in Japan and is increasingly popular in neighboring countries. Most Asians might believe     7     the blood-type theory, but for many it seems     8     (harm) and not something to be taken too seriously.

Is the belief true? The scientists in Asia largely dismiss (摒弃) the belief as a modern-day superstition (迷信). Most studies have failed to find any strong     9     (connect) between blood and personality.     10     (general), scientists warn against making predictions or important decisions based on this questionable theory.

Are you sometimes a little tired     1     sleepy in the early afternoon? Many people feel this way after lunch. They may think that eating lunch is the cause of the sleepiness. Or, in summer, they may think it is the heat. However, the real reason lies inside their bodies. At that time——about eight hours after     2     (wake) up——your body temperature goes down. This is what makes you slow down and feel sleepy. Scientists have tested sleep habits in experiments in     3     there was no night or day. The people in these experiments almost always     4     (follow) a similar sleeping pattern. They slept for one long period and then for one short period about eight hours     5    .

In many parts of the world, people take naps     6     the middle of the day. This is     7     (especial) true in warmer climates, where the heat makes it difficult     8     (work) in the early afternoon. Researchers are now saying that naps are good for everyone in any climate. A     9     (day) nap gives one a more rested body and mind and therefore is good for health in general. In countries where naps are traditional, people often suffer less from     10     (problem) such as heart disease.