三、（2023·淮安市淮阴区一模）任务型阅读。
The Spanish flu（流感）also known as the 1918 flu pandemic（流行病）was a deadly pandemic in recent history. It spread worldwide during the year 1918—1919. The virus infected（感染）500 million people，about a third of the world's population at the time.
The outbreak of the Spanish flu was caused by an H1N1 virus with genes of avian（鸟类的）origin（起因）. Historians now believe that World War Ⅰ could have been partly responsible for spreading the virus. Lack of hygiene（卫生）and malnutrition（营养不良）may have also been responsible for weakening the immune system.
There hasn't been any agreement among scientists about the origin of the virus. The 1918 flu was first observed in Europe，the United States，and parts of Asia before swiftly spreading around the world. It is believed that social media was the main reason why this pandemic was called the Spanish flu. To keep morale（士气），World War Ⅰ censors（审查官）reduced early reports of illness and death rate in Germany，the United Kingdom，France，and the United States. However，because Spain wasn't at war with any country，newspapers were free to report the epidemic's（疫情）effects in Spain，such as the serious illness of King Alfonso ⅩⅢ. These stories created a false impression of Spain as especially hard hit. This gave rise to the name “Spanish flu”.
In 2015，nearly a century after the Spanish flu hit，the World Health Organization（WHO）called on people to follow best practices in naming new human infectious（传染性的）diseases to reduce unnecessary negative effects on nations，economies and people.
Unlike most influenza outbreaks（流感爆发）that largely kill the very young and the very old，with a higher survival rate for those in between，the Spanish flu pandemic resulted in a higher than expected death rate for young adults. The death was estimated to be at least 50 million worldwide，possibly as high as 100 million，making it one of the most serious pandemics in human history.
1. The Spanish flu
was also known as
the 1918 flu pandemic. During the year 1918—1919，about a third of the world's population
was infected
by the virus.
2. The flu
broke out
because of an H1N1 virus with genes of avian origin. However，scientists
haven't agreed/haven't reached an agreement
on the origin of the virus.
3.
The main cause
of the pandemic being called the Spanish flu was social media. Spain wasn't at war with any country.
As a result/Therefore
，it was free for newspapers to report the epidemic's effects in Spain.
4. To reduce
unnecessary negative effects
on nations，economies and people，the WHO called on people
to follow
best practices in naming new human infectious diseases.
5. The Spanish flu，unlike most influenza outbreaks，killed
(more) young adults
. The death was 50 million or more and it made the Spanish flu
one of the most serious pandemics
in human history.
