When people talk about the most popular new Chinese Internet words, the first es into their mind is “hold up”.
A. one
B. of them
C. which
D. that
网友回答
A. one
B. of them
C. which
(答案→)D. that
解析：考查定语从句。定语从句that es into their mind修饰先行词the first. that引导起这个定语从句并在句中做主语。特别注意当先行词是序数词或者被序数词修饰时关系代词用that,而不是which.