填空题

Clocks through Time
It took human being a long time to invent diverse ways for telling time. About
3000 years ago people first made a circle with a stick in tile center of it to (1) [1] ______
______ the passage of time by noticing various marks on the circle the shadow of
the stick fell across.
Since these kinds of circles that are called (2) ______ did not work without [2] ______
the sun, men had to find other ways to keep track of time, including a (3) ______ [3] ______
candle on which each stripe took about one hour to melt, a water clock which had a
line with a number beside it for every hour and an (4) ______ which followed tile [4] ______
invention of glass blowing.
The first clock with a face and an hour hand was invented about 600 years ago
for few people. With the gradually (5) ______ use of clocks, they were beautiful- [5] ______
ly (6) ______, though they could not keep correct time. Scarcely had clocks been [6] ______
made small enough to be carried when watches came into use.
As the beginning of the style of "grandfather clocks, which were enclosed in
tall wooden boxes, the (7) ______ clock was made in 1657. In 1700, there were [7] ______
clocks with minute and second hands. About 200 years later, a clock is commonly
used in every house and a watch is almost used by every (8) ______ gentleman. [8] ______
A newly created clock that shows the time exactly is so- called (9) ______ [9] ______
clock. Nowadays such a clock has more and more complicated functions.
(10) ______ as clocks and watches are, time means different things to differ- [10] ______
ent nations.