题目内容：

阅读下面的短文，根据短文后的要求答题（请注意问题后的字数要求）。

[1] When I was in primary school , I got into an argument with a boy in my class . I have forgotten what the argument was about , but I have never forgotten the lesson learned that day .

[2] I was convinced that “ I ” was right and “ he ” was wrong－and he was just as convinced that      and “ he ” was right . The teacher decided to teach us a very important lesson . She brought us up to the front of the class and placed him on one side of her desk and me on the other .

[3] In the middle of her desk was a large , round object . I could clearly see that it was black . She asked the boy what color the object was . “ White , ” he answered .

[4] I couldn’t believe he said the object was white , when it was obviously black ! Another argument started between my classmate and me , this time about the color of the object .

[5] The teacher told me to go to stand where the boy was standing and told him to come to stand where I had been . We changed places , and now she asked me what the color of the object was . I had to answer , “ White .” it was an object with two differently colored sides , and from his viewpoint it was white . Only from my side was it black .

[6] My teacher taught me a very important lesson that day : You must stand in the other persons’ shoes and look at the situation through their eyes in order to truly understand their perspective（看法）.

1.What is the main idea of the text ? ( no more than 8 words )

                                                           

2.Complete the following statement with proper words . ( no more than 4 words )

                 was unbelievable , for the object was obviously black .

3.What did the teacher ask the students while changing positions ? ( no more than 6 words )

                                                           

4.Fill in the blank in Paragraph 2 with proper words . ( no more than 3 words )

                                                           

5.What does the word “ it ”(the underlined word in Paragraph 5) probably refer to ? ( no more than 3 words )