题目内容
This is the most serious and worst situation ________ I have ever experienced as a fan of the NBA.
A. which B. when
C. that D. where
C
解析试题分析：考查定语从句。句中先行词situation，在定语从句中作动词experience的宾语，故用关系词which、that或省略。因为最高级形容词修饰先行词，故用that。句意：这是作为NBA粉丝所经历过最严重和最坏的情况。故C正确。
考点：考查定语从句
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