BrainPOP is an educational program consisting of brief animated videos a man named Tim and his robot friend Moby discuss various subjects.
A. in which
B. which
C. as
D. in that
网友回答
(答案→)A. in which
B. which
C. as
D. in that
解析：考查定语从句。本题定语从句的先行词是animated videos，后面定语从句的句子结构很完整，故使用关系副词where在句中做状语，在定语从句中关系副词经常可以被换成“介词+关系代词”；that不能放在介词的后面。BC都是关系代词。故A正确。