36. She hasn't surfed the Internet for two days.
→ The last time she surfed the Internet was two days ago.
37. Penicilin can cure many dangerous diseases.
→ Many dangerous diseases can be cured by penicilin.
38. Mount Everest is higher than any other mountains in the world.
→ Mount Everest is the highest mountain in the world.
39. "I'm working in a restaurant." she said.
→ She said she was working in a restaurant.
40. Scientists have tried very hard to find a cure for AIDS.
→ Enormous effort has been made to find a cure for AIDS.
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