In the times of Queen Victoria, the so-called “King Cholera” often     1     (lead) to large numbers of deaths. It was John Snow     2     wanted to help ordinary people exposed     3     cholera, and found a cure to this     4    (death) disease. John Snow thought the most important was to find its cause. So in 1854 when a cholera broke out, he began to gather information. He marked on a map the exact places     5     the victims had lived and he found that many people who     6     (drink) the dirty water from the pump died. As     7     result, he drew a     8     (conclude) that the     9     (pollute) water was the cause of cholera and suggested that the source of all water supplies     10    (examine) immediately. Finally “King Cholera” was defeated.

Since the outbreak of COVID-19, there     1     (be) a lot of discussion about quarantine (隔离) at home and “cabin fever (幽居病)” is frequently mentioned.

Cabin fever is the reaction to       2     (trap) in a building for too long. This expression comes from people     3     are stuck in a cabin due to extreme weather. It can cause people to suffer from     4     (anxious) and sadness, which is an     5    (absolute) serious thing. They are left in the cabin without access     6     satisfying food supplies,     7     they may also have weight loss. Lacking concentration is just another consequence.

To cope with this, you should first make     8     a habit to have regular meal time and bed time. Also, compared with watching your mobile phone all the time, reading a book or doing things like puzzles can refresh your mind and make it more active than the former one. Moreover, a call should be made     9     (ensure) your friends and family are OK if they are in the same situation. Finally, set a goal to keep you focused. You can even make weekly goals,     10     (depend) on how long your quarantine will last.