问题补充:
If you don’t know how to use the word, you should in a dictionary.
A. look up it
B. look it up
C. look them up
D. look up them
答案:
A. look up it
(答案→)B. look it up
C. look them up
D. look up them
解析:it它,指代前文提到过的单数事物;them他们,指代前文提到过的复数名词;句意:如果你不知道如何用这个单词,你应该在词典里面查一下。英语中当人称代词做由动词+副词构成的动词短语的宾语时,应该放在动词后面,副词前面。本句中代词指代前文提到的单数名词word,故选B。