题目内容：

阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。

A long, long time ago a little boy 1.________(walk) through a park. In the middle of the park there was a tree with a sign on it. The sign said “I am a magic tree. Say the magic words and you’11 will see.”

The boy tried to guess the magic words. He tried abracadabra (咒语), but 2._____ of them worked.

3._______ (exhaust), he threw 4._______(him) on the floor, saying: “please, dear tree!” and suddenly, a big door 5.________ (open) in the trunk. Inside everything was dark, except for a sign 6._______ said “Carry on with your magic."Then the boy said “Thank you, dear tree!" With this, the inside of the tree lit up 7._______(bright) and revealed a pathway 8._________(lead) to a great big pile of 9.________(toy) and chocolate.

The little boy brought all his friends to the magic tree, and they had the best party ever. This is 10._______ people always say that “please” and “thank you” are the magic words.