25.  However, the typical teenage lifestyle is already filled with so much competition that it would be wise to plan activities in which there are more winners than losers, ______, publishing newsletters with many student-written book reviews, displaying student artwork, and sponsoring book discussion clubs.
【正确答案】 C
【答案解析】 语义连接。本句前一部分提到要设计一些获胜者多于失败者的活动，而空格后则建议出版一些学生写的书评的通信等，这无疑是对activities的举例说明，选项中，只有for example可以表示举例子。故答案为C。