The topic, which many people a small one, will actually have a great influence us.
A. think as; to
B. think of as; on
C. think as; upon
D. think of as; to
网友回答
A. think as; to
(答案→)B. think of as; on
C. think as; upon
D. think of as; to
解析：句意：专题，其中许多人认为是一个很小的话题其实最终会给我们带来很大的影响。think of …as…是固定搭配，意思是：把…看做是……。这里的which代替先行词which引导定语从句，并在从句中做think of的宾语。由句意可知选B。
考点: 考查动词词组和介词的用法。