if you don't know a word ,you can __ it __ in a dictionary .

问题描述:

if you don't know a word ,you can __ it __ in a dictionary .
A.look ; for B.look ; up C.look after D.look ; like

选B.look up in a dictionary 查字典.
look for是寻找,look after 照顾,look like 看起来像.