Ifyoudon’tknowaword,youmust

来源：语文精选馆 2.31W

If you don’t know a word, you must _______ the word in a dictionary.

A．look up B．look down C．look over D．look out

【解析】句意：如果你不认识单词，你必须查字典。A. look up查阅；B. look down俯视；C. look over检查；D. look out小心、注意。look up the word in a dictionary查词典。故选：A。

点睛：look up含义较多，主要有：①向上看; 抬头看；②仰视；③查阅。在平日学习中，要注意牢记类似的常用动词短语的一词多义。