2015 is the Year of Light. Read the article below about Daylight Savings Time, and complete the text by writing one word in each space. There is one example (0) at the beginning.

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. Note that you will lose points if you ask for hints!
Many Americans will spring forward an hour to mark the beginning of daylight savings time (DST) — (0) also known as daylight saving time — at 2 a.m. on Sunday, March 8. Time will fall back (1) standard time again on Sunday, November 1, when DST ends. The annual adventure in altered timekeeping has produced some entertaining and exasperating situations over the past century. (2) U.S. state and territory is free to ignore daylight savings time, so residents of Arizona (except those on the Navajo Nation), Hawaii, Puerto Rico, the Virgin Islands, and other territories won't move their clocks this weekend. If these exceptions seem confusing, the situation was far worse 50 years ago.
Before the U.S. Uniform Time Act of 1966, DST was often observed very locally — and chaos was the result. Why did this tempest of timekeeping confusion begin (3) the first place? Daylight savings time was first realized on a grand scale during World War I. It started in Germany, then caught on in a number of nations (4) wanted to reduce lighting demand and save coal for the war effort. During WWII, the U.S. observed year - round DST (5) the same reasons. But it turns out that these sweeping time changes — mostly intended to save energy — weren't based on any evidence.
Governments have had just as much trouble keeping track of time changes (6) everyone else. When Yugoslavia's president, Marshal Tito, visited the U.S. in 1963, his welcome was botched (7) of daylight savings time. Tito's plane landed in a Virginia town that hadn’t advanced its clocks with the rest of the state, so nobody was there to greet him. Daylight savings time has some unexpected winners and losers when it comes to how Americans spend their time and money. Research shows that given an extra hour of evening daylight, many Americans use the time to go out and do things (8) than watch the television shows they'd normally view at that time. Theaters also take a hit. When it's dark early, people may feel it's a good night to take in a play or a movie. But (9) it's going to be light until 8:00, they may decide to take a walk or do something outside.
Thieves tend to do their dirty work (10) the cover of darkness. So, creating an extra hour of evening light helps people get home during daylight hours, (11) appears to drop crime rates dramatically.