题干
If you don't know the meaning of the words, you can look _____ in the dictionary.
A：at them
B：them up
C：after them
D：them down
答案(点此获取答案解析）
B
If you don't know the meaning of the words, you can look _____ in the dictionary.
A：at them
B：them up
C：after them
D：them down
