问题补充:
If you don’t know how to spell new words, in a dictionary.
A. look them up
B. look up them
C. look them after
D. look them for
答案:
(答案→)A. look them up
B. look up them
C. look them after
D. look them for
解析:句意:如果不知道怎么拼这些新单词,可以查字典。Look up查阅(字典);当宾补是代词时要放在动词和副词中间,故选A;look after照顾;look for寻找。