Rewrite the sentences (1-5) in the passive. Match them with rules (2-4) in the Learn this! box. The sentences may match with more than one rule. (Viết lại các câu (1-5) ở thể bị động. Ghép các câu với các quy tắc (2-4) trong phần Learn this! Các câu có thể tương ứng với nhiều hơn một quy tắc.)
1. A doctor has examined me and told me to rest at home.
2. It was in the 19th century that they invented anaesthetics.
3. Scientists are making more advances in medicine every year.
4. They’ll stitch the wound now and remove the stitches next week.
5. Kazimierz Funk, a Polish scientist, discovered the fact that vitamins could cure many diseases.