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Questions 14-16 are based on the following talk about great inventions. You now have 15 seconds to rend Questions 14-16. What made people healthier and let them five longer lives in the middle part of the 20^th century

A．Improved living conditions
B．New ways to help people get over diseases.
C．Many inventions in industry.
D．Industrialization in developing countries.

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Wooden basket was used but nowadays it is

Questions 14-16 are based on the following talk about great inventions. You now have 15 seconds to rend Questions 14-16. What made people healthier and let them five longer lives in the middle part of the 20th century 您的浏览器不支持 audio 元素。