I don’t like any humor in this serious speech because I can’t think of any circumstance this would be beneficial or useful.
A. which
B. whether
C. where
D. as
网友回答
A. which
B. whether
(答案→)C. where
D. as
解析：
试题分析:句意：我不喜欢这种严肃的演讲中的任何幽默，因为我想不出其中幽默会带来好处或益处的环境。从结构判断此处是circumstance后的定语从句，排除B选项；而从句中主干完整，应该用关系副词，which和as是关系代词，故答案选C。