根据短文理解,从A、B、C、D四个选项中选择最佳答案填空。
Mr. Brown and his son Jack lived in a house with a garden. There was a 1 in the garden. When they went through the garden, they were always tripped (绊倒;绊)by the stone.
One day, Jack said to his father, “I2 that stone. Why don't we move it away?”
Mr. Brown said, “It was there when your grandfather was 3. It's so big. We can't move it.”
Twenty years later, Jack 4 up and had a son. One day, Jack's son said to him, “Look at the stone. Shall we move it?”
Jack said, “That stone is too 5. We can't move it.”
But his son made a 6 to move it. He brought some tools to the garden. He dug around the stone.
Jack thought that it would take his 7 the whole day to move the stone. To his 8, the little boy only 9 ten minutes moving it.
Sometimes, things are not as 10 as we thought. Just do it.