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1 完形填空A(10分)Men first measured time ＿(1) using a stick in the ground.The length of the＿ (2) shadow would＿ (3) what time of day it was. ＿(4) ,the Egyptians used a pillar,＿ (5) as a gnomon,and then developed a simple sundial,＿ (6) consisted of a stone with