Luyện ngữ pháp - English Grammar in Use - Intermediate - (Unit 42: Passive 1)


Write questions using the passive. Some are present and some are past.
  1. Ask about glass. (how / make?) ?
  2. Ask about television. (when / invent?) ?
  3. Ask about mountains. (how / form?) ?
  4. Ask about antibiotics. (when / discover?) ?
  5. Ask about silver. (what / use for?) ?
Exercises - 42.1 Exercises - 42.3


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