Early men did not have clocks. They were told time by the 【76】______ sun and shadows of trees. At first time, they used

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问题     Early men did not have clocks. They were told time by the 【76】______
sun and shadows of trees. At first time, they used            【77】______
sticks placing in the ground instead of trees. They made      【78】______
marks in the ground, and the shadows from the sticks told     【79】______
the time of day. Later, men began to use sundials. Some of    【80】______
sundials were boxes with sticks cast a shadow. Men were       【81】______
able to take the sundial box with them. The mark for noon     【82】______
was very important. The sundials always have to face the same 【83】______
way or the time was wrong. Sundials were good only on sunny   【84】______
days, not on cloud days. They were the first kind of clock.   【85】______

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答案sticks改成stick to

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