Cover of the textbook Performer B2 - Workbook

The key answer of exercise 7

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

Transform the sentences from active into passive and viceversa.

Answer

  1. The anaesthetic properties of chloroform were discovered by Sir James Young Simpson.
  2. A lot of new medicines for diabetes have been put on the market in recent years.
  3. Researchers don't identify new types of bacteria very often.
  4. The scan wasn't invented by Wilhelm Röntgen, the X-ray was. / The scan wasn't invented by Wilhelm Röntgen, the X-ray was invented by him.
  5. When will a cure be found?
  6. Malaria can be carried by mosquitoes.
  7. Do molecular biologists analyse cells?
  8. A famous journalist is going to interview two renowned experts.

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