When electricity was first invented, people refuse to believe such a thing .
举一反三
- When was the first bicycle invented The first bicycle was invented .
- Why people invented the first computer?
- 中国大学MOOC: Why people invented the first computer?
- Believe it or not, when first ____ to Europe, tomato was thought to be poisonous.
- When writing a travel plan, usually the first thing is to decide the __________.