完形填空
What time is it？There are many ways you can find out the1 . You may have a watch. You can look at a 2 on the wall. You can listen to the radio too.
It is not always easy to know the time. A long time ago people looked at the sun to tell the time. They could tell the time of the day by looking at the sun in the sky： 3 ，noon or afternoon.
Hundreds of years later，people invented a machine called clock. After that people4 small clocks，they could carry them in their pockets（口袋）. People call very small clocks5 . Now many people keep watches.
