Jim looked up from his book. All his classmates were laughing at something. He turned around and asked Kate what was so funny. Kate tried to say something, but she couldn"t stop laughing. Everybody was looking at Jim"s feet. Jim looked down at his feet and saw a black shoe on one foot and a white show on the other.

【参考译文】

　　吉姆的眼睛离开书本抬头看去。他的全班同学都在笑什么。他转过身来问凯特什么事这么可笑。凯特想说什么，可是笑得说不出话来。大家都去看吉姆的脚。吉姆也低头看自己的脚，却发现一只脚穿着白鞋，另一只脚穿着黑鞋。