Sundials
Go outsinde on a sunny day and look 1)at/on your shadow! early 2)in\at the morning and late in the afternoon, it is long. At lunchtime, it 3) has\is very shotr. This is because the Earth moves around the sun and the sun is in a different place 4) in\on the sky at different timse of the day. Sundials use shadows to tel the time. They 5) have\are the oldest way to tell the time! Перевод и правильный вариант.