问题补充:
You don’t have to every new word in the dictionary while reading.
A. look for
B. look up
C. look at
D. look after
答案:
A. look for
(答案→)B. look up
C. look at
D. look after
解析:look for寻找;look up查阅,向上看;look at看;look after照顾,关心.句意:当读书时,你必须在词典中查阅每个新单词.结合语境可知选B.