阅读短文，然后根据内容回答所提问题。

Invention	The wheel	The telephone	The light bulb
Inventor	Don’t know	Alexander Graham Bell	Thomas Edison
When was it invented	A few thousand years ago	1876	1879
Life before the invention	Travelling was very difficult.	People could not speak to each other over long distances.	People had to use oil lamps, gas lamps or candles to see at night.
Life after theinvention	Travelling became faster and more comfortable.	People can keep in touch with each other anytime anywhere with mobile phones.	People can do as many things in the evening as they can in the day time.

【小题1】Which of the three things was invented first?
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【小题2】Who is the inventor of the light bulb?
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【小题3】When was the telephone invented?
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【小题4】How did travelling become after the invention of the wheel?
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