阅读下面短文，掌握其大意，然后从1~7 各题所给的三个或四个选项中，选出最佳选项。

There was once a farmer who lived near a road. It was not a1road, but from time to time, cars passed the farm.

Near the farm gate, there was a large 2 in the road. This hole was always full of water.

The drivers of the cars that passed by could not 3 how deep the hole was. They thought it was probably shallow (浅的). Then when they drove into the hole, they could not drive4because it was very deep.

The farmer did not spend much time5on his farm. He spent most of time watching the hole. When a car drove into it, he pulled the car out with his tractor (拖拉机) and demanded a lot of6 for doing this.

One day, a driver of a car said to him: “You must make a lot of money by pulling cars out of this hole7.”

“Oh, no,” the farmer said. “I don't pull cars out of the hole at night. At night I fill the hole with water.”

玩弹弓时，橡皮筋拉得越长，同样的“石子”射得越远，这说明橡皮筋的弹性势能与____ 有关；若橡皮筋被拉的长度相同，而所用“石子”的质量不同，则质量大的“石子”射出的距离较小，原因是质量大的“石子”射出时的____ 小；若用此弹弓竖直向上射出一石子（不计空气阻力），则石子在上升过程中的能量转换关系是____ ，此过程中石子的____ 不变．

阅读下列材料：

忆昔开元全盛日，小邑犹藏万家室。稻米流脂粟米白，公私仓廪俱丰实。九州道路无豺狼，远行不劳吉日出。齐纨鲁镐车班班，男耕女织不相失。

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