阅读短文，根据其内容回答问题。
The idea of daylight (日光) saving time started with an American named Benjamin Franklin (1706-1790).
He explained how a lot of the money spent on candles used for light (This was before electricity电) could be
saved if everyone woke up earlier and went to bed earlier.
Even though Franklin's idea had a clear meaning, most people didn't want to get up earlier than they had
to. Who would?
An Englishman named William Willet didn't come up with a way to "make" the sun set (落下) later until
1907. His idea was to turn clocks forward (向前) by 20 minutes on each of the four Sundays in April, for a
total (总计) of 80 minutes.
William's idea was laughed at, at first. But when World War I started in 1914, many countries decided
they had to save energy (能源) for the war.
Daylight saving time has other uses. The more time you spend outside playing, the less time you are
spending in front of the computer or the TV. These things also use energy.
Also, daylight saving time sometimes causes problems. For example, China used it in 1986 —but stopped
it in 1991. That was because the temperatures are quite different from North to South and time from East to
West.
If the people from northwest part of China use daylight saving time, sometimes they have to get up to
work when it is not very bright outside. That will cause some trouble for them.
Still, most parts of the world do have daylight saving time, and most people look forward to the extra
(额外的) hour of evening light.
1. Did the idea of daylight saving time start with an American named Benjamin Franklin?
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2. In which year was the idea of daylight saving time put in use?
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3. According to this passage, what can you do when daylight saving time is used.
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3. Why is daylight saving time not used in China now? The country
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4. Why did Franklin give the idea of daylight saving time?
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