Our teacher told us to the new words in the dictionary if we didn’t know them.A. look over

问题补充：

Our teacher told us to the new words in the dictionary if we didn’t know them.

A. look over

B. look after

C. look down

D. look up

答案：

A. look over

B. look after

C. look down

(答案→)D. look up

解析：look over检查，查看；look after照顾；look down俯视，向下看；look up仰望，查阅。句意：老师告诉我们，如果我们不明白这些新单词，就在词典中查阅他们。结合语境可知选D。