The key answer of exercise 42.2
The key to exercise solutions in chapter Unit 42 - Passive 1 for the textbook English Grammar in Use with authors Raymond Murphy from Cambridge University Press
Question
Write questions using the passive. Some are present and some are past.
Answer
- How is glass made?
- When was television invented?
- How are mountains formed?
- When was DNA discovered?
- What is silver used for?
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