This dictionary is very useful. It has many problems about words and idioms for me.A. loo

发布时间：2020-08-17 15:14:23

This dictionary is very useful. It has      many problems about words and idioms for me.
A. looked up
B. kept up
C. taken up
D. cleared up

网友回答

A. looked up
B. kept up
C. taken up
(答案→)D. cleared up
解析：cleared up= solve 意思是：解释，解答. 
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