学进去

What time is it? There are many ways you can find out the _____. You may have a watch. You can look at a _____ on the wall. You can listen to the _____ too.

It is not always easy to know the time. A long time ago people looked at the _____ to tell the time. They could tell the time of day by looking at the sun in the sky: _____, noon or afternoon.

Hundreds of years later, people invented a machine called a clock. After that people _____ small clocks so that they could carry them in their pockets (口袋). People call very small clocks _____.   Now many people _____ watches.