John Snow got interested in two theories 【小题1】 (explain) how cholera killed people. He believed in the second theory that suggested that people absorbed the disease with their meals. In 1854，【小题2】 another outbreak hit London，he was ready to test the two theories. 【小题3】 the help of the map he made，he got a valuable clue about the cause of the disease and was able to announce that the water was to blame.

Martha McChesney Berry (7 October 1865 – 27 February 1942) was an United States educator and the founder of Berry College in Rome, Georgia.

In Mount Berry, Georgia, people find a group of schools 【小题1】(build) specially for mountain children. The schools, as well as the mountain 【小题2】, are named 【小题3】 Martha Berry.

Martha Berry was born in 1866. 【小题4】(luck) than most Georgian mountain children, she received education. But she never forgot other children of the mountains 【小题5】 parents couldn't afford to send them to school. In 1902 Martha Berry started 【小题6】 school with only five pupils. Now, ninety years later, there are a score of Berry schools in the area, with a total of over one thousand students and a 【小题7】(wait) list of about five thousand.

Martha Berry in her later years received many medals and honors 【小题8】 what she had done for the poor mountain children of Georgia, and in 1931 she 【小题9】(name) one of the most important women in the United States. She never stopped working for the mountain children 【小题10】 her death in 1942.

It was not until the outbreak of COVID-19 that people became 【小题1】 (full) aware of the importance of     wearing masks. However, few people know that masks 【小题2】 (invent) by Dr. Wu Lien Te, a distinguished medical expert in China. In the fight against the Manchurian plague (瘟疫), Wu made a great difference by taking effective measurements, such as masks, to control the infection with great caution. Dr. Wu, 【小题3】 was nominated (提名) for the Noble Prize in Medicine in 1935, set the standard for generations of doctors to follow.