【题目】Chinese scientists have made great advances in satellite technology, I suppose is of great significance to all mankind.
A. in which case B. for which reason
C. which D. what
在线课程【答案】C
【解析】考查which引导非限制性定语从句。句意：中国科学家在卫星技术方面取得了巨大进步，我想这对于整个人类都是有重要意义的。which引导非限制性定语从句，在从句中作主语，代指主句的内容，用逗号隔开，从句中I suppose为插入语。故选C。