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）.
小题1:What is the main idea of the text ? ( no more than 8 words )
小题2:Complete the following statement with proper words . ( no more than 4 words )
was unbelievable , for the object was obviously black .
小题3:What did the teacher ask the students while changing positions ? ( no more than 6 words )
小题4:Fill in the blank in Paragraph 2 with proper words . ( no more than 3 words )
小题5:What does the word “ it ”(the underlined word in Paragraph 5) probably refer to ? ( no more than 3 words )