问题
选择题
If you don't know how to spell new words , ______ in the dictionary. [ ]
A. look up them
B. look for them
C. look them up
D. look them for
答案
答案：C
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If you don't know how to spell new words , ______ in the dictionary. [ ]
A. look up them
B. look for them
C. look them up
D. look them for
答案：C