if you don;tknow ow to spell new words,please look-___up in the dictionary

if you don;tknow ow to spell new words,please look-___up in the dictionary
if you don;tknow ow to spell new words,please look-___up in the dictionary

if you don;tknow ow to spell new words,please look-___up in the dictionary
look them up前面的words 是复数,在字典里查找

if you don;tknow how to spell new words,please look-___up in the dictionary

如果你不知道怎么拼写新的单词，请查阅字典。
look up 查看，查阅

it

填them．
前面的words是复数．
这要填个代词．