--- I want to know whether the day I am looking forward to will e today or tomorrow.
--- Does that make any difference?
A. when
B. why
C. that
D. on which
网友回答
A. when
B. why
(答案→)C. that
D. on which
解析：
试题分析: 句意：——我想知道是否我一直盼望的那天在今天或者明天到来。——那有什么不同吗？定语从句中缺少look forward to的宾语，所以用关系代词，答案选C。