A rich man was once riding along the road and saw an old man digging in his garden.On the ground lay a young tree，ready to be planted.The rich man called out to the old man，"What kind of tree are you planting there，my good man？"
   "This is a fig（無(wú)花果） tree，sir." He said.
   "A fig tree？" the rich man was very surprised，"Why，how old are you，may I ask？"
   "I am ninety years old."
   "What!" laughed the rich man，"You re ninety years old.You are planting a very young tree now and it'll take years to give fruit.You certainly don't hope to live long enough to get any fruit from this tree." The old man looked around the garden.Then he said with a smile， "Tell me，sir.Did you eat figs when you were a boy？""Sure，" the man did not know why he asked this question."Then tell me this，" he said， "Who planted the fig trees？""Why—why？I don't know.""You see，sir." went on the old man， "Our forefathers planted trees for us to enjoy and I am doing the same for the people after me."
   The rich man was quiet and said， "You are right，my good man.We should do some things for the people after us.Thank you very much." Then he rode away.
（1）How old was the old man？

Ninety years old.

Ninety years old.

（2）What tree was the old man planting when the rich man saw him？

A fig tree.

A fig tree.

（3）Who was he planting the tree for？

The people after him.

The people after him.

（4）Why did the rich man laugh at the old man at first？

Because the old man is so old that he isn't able to eat the fruit.

Because the old man is so old that he isn't able to eat the fruit.

（5）Why was the rich man quiet in the end？

Because he was moved by the old man's behavior.

Because he was moved by the old man's behavior.