问题补充:
If you don know the word, you can in the dictionary.
A. look it after
B. look at it
C. look for it
D. look it up
答案:
A. look it after
B. look at it
C. look for it
(答案→)D. look it up
解析:look after照看,照顾;look at看;look for寻找;look up向上看,查阅。句意:如果你不认识这个单词,你可以在词典里面查一查。人称代词做由动词+副词构成的动词短语的宾语时,一般要放在动词后面,副词前面,故选D。