When we meet some new words we’d better in a dictionary.A. look them upB. look them outC.

问题补充：

When we meet some new words, we’d better in a dictionary.

A. look them up

B. look them out

C. look out them

D. look up them

答案：

(答案→)A. look them up

B. look them out

C. look out them

D. look up them

解析：look up仰望，查阅；look out向外看，当心。句意：当我们遇到一些新单词时，我们最好在词典中查阅他们。人称代词作动词短语宾语时，一般放在介词前面，动词后面。故选A。