The key answer of exercise 9
The key to exercise solutions in chapter Unit 7 - Science in action for the textbook Performer B2 - Workbook with authors Marina Spiazzi, Marina Tavella, Margaret Layton from Zanichelli
Question
Complete the fact file about plasters with the correct tense of the verbs in brackets. Use the active or passive form.
Answer
- have undergone
- be found
- aren't used
- applied
- were made
- was built
- were invented
- followed
- are made
- are designed
- are equipped
- monitor
- are experimenting
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