题目内容：

    A boy called Mario had many friends at school and he was happy about it.

　One day, his grandpa said to him, “Mario, I know that you don’t have as many friends as you think. Many of them are not true to you.”  Mario thought maybe his grandpa was right. However, he wasn’t sure who were his true friends, so he asked his grandpa. The old man answered, “I have just exactly what you need. It’s in my room. Wait a minute.” The old man left, soon returning as if (好像) carrying something in his hand, but Mario could see nothing there.“Take it. It’s a very special chair. Because it’s invisible, it will be difficult for you to sit on it. However, if you sit on it, you can use the chair’s magic power(魔力) to tell who your true friends are.”

　    Mario took the strange invisible chair to school. At break time he asked everyone to stand around and he put himself in the middle, with his chair. “You will see something amazing,” said Mario. Then he tried sitting on the chair. However, he missed and fell to the ground. Everyone had a pretty good laugh. “Wait, wait,” said Mario, making another try. But again he missed the seat.Mario didn’t give up. He kept trying to sit on the magic chair. Finally, he did it. This time he felt himself in mid-air.

　    Then he experienced(经历) the magic that his grandpa talked about. Looking around, Mario saw George, Lucas and Diana holding him up, so he wouldn’t fall. But the other schoolmates  had done nothing but made fun of him. Mario was quite thankful to his grandpa, who helped him test who his true friends were.

1.Mario’s grandpa gave him a special chair to ______.

A. sit on in the school B. play games with his schoolmates

C. be his birthday present D. test who are his true friends

2.What does the underlined word “invisible” mean in Chinese in the passage?

A. 看不见的 B. 有帮助的 C. 神奇的 D. 感激的

3.Which of the following is TRUE according to the passage?

A. There was really an invisible magic chair.

B. Mario has as many friends as he thought.

C. Some of Mario’s friends were not true to him.

D. Three of his friends could see the magic chair.

4.Which would be the best title for this story?

A. A Magic Chair B. A kind Grandpa

C. Mario’s True Friends D. How to Test Friends