If you don't know how to spell a word,look it ___ in the dictionary.

问题描述:

If you don't know how to spell a word,look it ___ in the dictionary.
a.after
b.for
c.out
d.up
请问选哪个?选和不选的原因?顺便把句子翻译成中文.

填 D
你要是不知道怎么拼写单词,就查字典
look up in the dictionary.查字典.