The idea of daylight 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) could be saved if everyone woke up earlier and went to bed earlier.
Even though Franklin’s idea had a clear meaning， 1 ．Who would?
It was not until 1907 that an Englishman named William Willet came up with a way to "make" the sun set later．His idea was to turn clocks forward by 20 minutes on each of the four Sundays in April，for a total of 80 minutes．
William’s idea was laughed at，at first．But when World War I started in 1914， 2 ．
3 ．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． 4 ．For example，China used it in 1986，but stopped it in1991．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． 5 ．
Still, most parts of the world do have daylight saving time，and most people look forward to the extra hour of evening light.
| A．daylight saving time sometimes causes problems B．many countries decided they had to save energy for the War C．People must get up early． D．most people didn’t want to get up earlier than they had to E．That will cause some trouble for them． F．Daylight saving time has other uses． |
DBFAE