Some people think so (1) highly of the seven-day week. They say it is a real monument to (2) __astronomical_ knowledge. Other people call the seven-day week illogical, but are people always (3) __logical_? Maybe this illogicality makes life more (4) __interesting_ for us. So who is right? Let’s have a look at some (5) __historical_ events. The early West (6) _ historians had a four-day week. The ancient (7) ___Romans had an eight-day week. Do you know why? That was a period of time between their markets. Other cultures had (8) _different__ views. The (9) __Chinese_ had a cycle of fifteen days, the (10) ___Egyptians ten. It was the (11) ___astrologists of Mesopotamia who first used the seven-day week. They decided to have one day for each of the most (12) _important__ objects in the sky – the Sun, the Moon and five major planets people can see.