The key answer of exercise 4
The key to exercise solutions in chapter 7 - Grammar for the textbook Performer B2 - Student's Book with authors Marina Spiazzi, Marina Tavella, Margaret Layton from Zanichelli
Question
Listen to five doctors talking about health advances that changed the world and complete the table.
Answer
- vaccines; 1796
- 1846
- (introduction of) clean water and sanitation
- Sir Alexander Fleming; 1928
- X-rays; late 1800s
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