单选题上大学以后，______丰富起来了。A 各种校园文化活动可以我参加的B 我可以参加各种校园文化的活动C 我可以参加的各种校园文化活动D 参加各种校园文化活动我的

正确答案：A
由参加大学生志愿者协会的学生都参加了校园文化促进会，所有参加书法协会的学生都没参加校园文化促进会，可得出所有参加书法协会的学生都没参加大学生志愿者协会。又由有些参加心理潜能开发协会的参加了书法协会，可得出有些参加心理协会的学生没有参加大学生志愿者协会。故答案为A选项。

不可以，一旦考点选择后就不能更改

参考答案：
Campus Activities
Campus activities have been organized in many universities and colleges.
These activities range from academy to recreational, such as academic reports, speech contests, poet’s club, painting clubs, singing and dancing groups, etc.
These activities provide students with two major advantages.First of all, they play a positive role in improving students’ studies.Due to their heavy schedules, students are often buried in textbooks and seldom expose themselves to a colorful life.But the various activities provide opportunities for them to relax themselves and enrich their minds.In addition, the activities also serve students living in the “ivory tower” more chances to get in touch with society.From these activities, the participants have to leave the classroom and get to know the society.
All these offer an important means for students to broaden their horizons.By participating in campus activities, they have fulfilled university life and in turn help campus activities to grow and flourish.