031.
You may think that America is a free country and Americans kiss their friends. Well, it is a free country as far as rights go, but this does not apply to social situations. If you kiss the wrong person, you might get into trouble. This is what happened to John, a six-year-old primary pupil.
Who did he kiss? One day at school, he kissed a girl in his class on the cheek. However, a teacher saw it and told the principal who thought that John should be punished.
John was told to leave his classroom and stay in another classroom by himself. When John's mother discovered this, she was very angry. She wanted the principal to tell her why the school should punish her son for kissing another six-year-old. "The girl asked him to kiss her and he did this only to show friendship. What's wrong with that?" she said. The principal thinks that a boy kissing a girl is wrong, even though they are only six years old. "It is stated clearly in the student handbook. It is unwelcome behavior," the principal said.

答案解析：
(1) 正确答案为C。根据Americans kiss their friends美国人会亲吻朋友们；以及John, a six-year-old primary pupil，约翰是一个六岁的小学生。可知，约翰是美国男孩，因此C项正确。
(2) 正确答案为B。根据he kissed a girl in his class on the cheek. 他亲吻了他们班一个女孩的脸颊。可知，约翰受罚是因为他亲吻了他们学校的一个女孩，因此B项正确。
(3) 正确答案为A。根据he did this only to show friendship. 他这么做只是想表达友谊。可知，约翰的妈妈认为约翰这么做是为了表示友好，因此A项正确。