We put a slice of lemon into a cup of strong tea and the tea –––––– (become) pale. We strike a match and a stick of wood –––––– (burst) into flame and –––––– (turn) into charcoal, These ––––––(be) all chemical reactions. The primeval man who –––––– (learn) to light a fire was the first chemist. He –––––– (accomplish) the first chemical reaction that of combustion. And this reaction is most necessary, the most important in the history of mankind. It –––––– (give) our distant ancestors the heat to warm their dwellings on cold days. In our time it –––––– (open) the way to outer space by propelling rockets weighing many tons into the sky. The legend of Prometheus who ––––(give) fire to the people –––––– (be) at the same time the legend of the first chemical reaction.
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Answered by
1
Answer:
1. became
2. bursted
3. turned
4. has been
5. learned
6. accomplished
7. gave
8. opened
9. gave
10. being
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Answered by
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Explanation:
1. became
2. busted
3. turned
4. has been
5. learned
6. accomplished
7. gave
8. opened
9. gave
10. being
these are the correct answers
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