Have you heard of pneumonic plague（肺鼠疫）? It's a kind of serious disease（疾病）that killed tens of millions of people in the 1450s in Europe. In 2020, two people from Inner Mongolia got this terrible disease, which caught people's attention again. Then what can we do to stop ourselves from catching it?
* Care about health
The World Health Organization（ WHO） says if we want to stay away from a dangerous disease, we should care more about our health before it appears.
According to the latest study, some factors（因素）decide people's health situations.
As we can see, our lifestyle plays an important role in our health. In other words, we will be half successful in having good health if we have healthy living habits, such as eating healthy food, doing exercise and having enough sleep.
* Care about hygiene（卫生）
To stay away from diseases like pneumonic plague, it's important for us to wash our hands often. We should also keep clear of mice.
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（1）
Why is pneumonic plague mentioned（提及）at the beginning of the passage?
A . To introduce the history of this disease.
B . To warn people not to go to Inner Mongolia.
C . To show the WHO's study about the disease.
D . To catch people's attention to the importance of health.
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（2）
Where did pneumonic plague happen in the 1450s?
A . In Asia.
B . In Africa.
C . In Europe.
D . In Inner Mongolia.
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（3）
What does the WHO advise about the disease?
A . People should run away from the disease as soon as possible.
B . People should start caring about the disease after it appears.
C . People should know their health situations in order not to have the disease.
D . People shouldn't be afraid of the disease.
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（4）
How many factors decide our health situations according to the chart（图表）?
A . Four.
B . Five.
C . Six.
D . Seven.
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（5）
Which of the factors plays the least important role to decide people's health situation?
A . Lifestyle.
B . Social environment.
C . Medical treatment.
D . Having enough sleep.
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