Television, marked by rapid change and refinement, is entering a new period, to reshape our
life and our world.
A. that promises
B. as is promised
C. which promises
D. what promises
网友回答
A. that promises
B. as is promised
(答案→)C. which promises
D. what promises
解析：主要测试定语从句。句子中含有逗号，这是解题的关键。所以属于非限制性定语从句, 用来补充说明另一新内容, 故选C.