Задание

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A special tool to measure time and location

You cannot see or touch time. At the same time it affects us every day. The first device that measured time was a sundial; however, it was good only on (SUN) days. People needed a better and a more (RELY) tool. That tool was the clock. The first clocks in Europe were water clocks. The ancient (GREECE) and Romans used water clocks to measure the time in court. When a certain amount of water ran out, (LAW) had to stop presenting their cases. Later water clocks were used in monasteries to keep track of the hours for prayers. The first (MECHANISM) clock in Europe appeared in 996 AD. It used gears instead of water for power. They gradually replaced water clocks. The gears of such clocks at first were so (MASS), that they could fill a large room. By the 1500 though, clocks were small enough to be carried from place to place. By the 1700, sailors began to use them to measure longitude and determine their location, and it was a great help to sailors in navigation.