【推荐1】根据课文内容，在空白处填入所缺的单词。

       However, he never lost his desire to destroy cholera once and for all. In     1    , doctors in those days had two     2     theories to explain how cholera spread. One theory was that bad air caused the disease. Another was that cholera was caused by an     3     from germs in food or water. Snow     4     to the second theory. It was correct, but he still needed     5    .

【推荐2】阅读下面材料，在空白处填入适当的内容（每空1个单词）或括号内单词的正确形式。（根据所学的课文内容填空）

John Snow was a well-known doctor   in London in the 19^th century. He wanted to find the c    1     of cholera in order to control it. In 1854 when a cholera     2     out, he began to gather information. He marked on a map where all the dead people had lived and he found that many people who had     3     the dirty water from the     4     died. So he decided that the polluted water carried cholera. He suggested that the source of all water supply be examined and new methods of dealing with polluted water be found. Finally, “King Cholera” was    5    .

【推荐3】根据提示默写单词，注意使用该词的正确形式。
A: They then tried     1    (煮开) fresh warm wood and using the     2    (液体)     3    (获得) from this to treat malaria. But this did not work either. However, To Youyou would not     4    (承认)     5    (失败).
B: Smart toilets will be keeping     6    (不断的) track of your health as well. They can warn you early on if there is something     7    (不正常的) or if you have a     8    (严重的) illness such as     9    (癌症) and     10     (潜在地) save your life.

【推荐1】课文内容填空

Many people are confused about the     1    (mean) of the names: the United Kingdom, Great Britain, Britain and England.     2     (solve) this puzzle, knowing a little bit about British history will help.

In the 16th century, the nearby country of Wales     3    (join) to the Kingdom of England, followed by the country Scotland in 18th century. In the 19th century, the Kingdom of Ireland was added to create the United Kingdom of Great Britain and Ireland.     4     (final), in the 20th century, the southern part of Ireland broke away    5    the UK, resulting in the full name we have today: “the United Kingdom” or “the UK”. People from the UK are called “British”,     6     means the UK is also often referred to as Britain or Great Britain.

Even though the four countries which     7     (belong) to the United Kingdom work together in some areas, such as using the same flag, sharing the same currency and military     8     (defend), they also have some differences. Anyhow, the United Kingdom has     9     long and interesting history to explore, which can help you understand much more about the country and     10     (it) traditions.

【推荐2】根据课文内容填空

The four countries that     1     to the United Kingdom work together in some areas. They use the same flag,     2     as the Union Jack, as well     3     share the same currency and military     4    . However, they also have some differences. For example, England, Wales, Scotland, and Northern Ireland all have different education systems and legal systems. They also have their own     5    , like their own national days and national dishes. And they even have their own football teams for competitions like the World Cup!

【推荐3】根据课文内容，在空白处填入所缺的单词。

By the Shang Dynasty (around 1600-1046 BCE), these    1     had become a well-developed writing system. Over the years, the system developed into different    2    , as it was a time when people were     3    geographically, leading to many     4    of dialects and characters. This, however, changed under Emperor Qinshihuang of the Qin Dynasty (221-207 BCE).

【推荐1】根据课文内容填空

In 2019, she was selected by the BBC as one of     1     of science in the 20th century along with Albert Einstein and Alan Mathison Turing. Tu Youyou     2     in being a scientist during a difficult time for science in China, her ability to use old wisdom and new methods to achieve her goals and the fact that her work     3    ,     4    .