用方框中所给单词的适当形式填空，使短文完整，通顺。
smile, they, spend, know, surprise, understand, question, our，happy, feeling |
Jack's uncle lives in a village. This summer Jack went to stay with him. He his holiday there. Every day they went out for a walk and his uncle at everyone. Jack didn't and asked，“ Uncle George, do you know around here?”
“No,” said his uncle.
“Then why do you smile at them?” asked Jack.
“Well, when I smile at someone, if he me, he'll be happy. But when I smile at someone, even though he doesn't know me, he'll feel and think, ‘Who is that man? Why does he smile at me?' He'll think about these all the way, and he will be , too. So I give everyone happy I think nobody refuses the smiles.”
“I see, Uncle George. Being kind to others is also be kind to ,” Jack said happily.