A farmer lives near a road. It is not a busy road, but you can still see some cars on it every day. Near the gate of the farm, there is a big hole on the road.
This hole is full of water, and the drivers can't see how deep the hole is. Some drivers think it may be very shallow(浅). But when they drive into the hole, they can't get out, because it is very deep.
They farmer doesn't spend much time working on his farm. He spends much time watching the hole. When a car gets into the hole, he helps the driver pull the car out and asks him to pay a lot of money for this.
One day, a driver says to him, "You make a lot of money by pulling cars out of this hole day and night."
"Oh, no," the farmer says. "I don't pull cars out of the hole at night. At night I fill the hole with water. "
