问题
选择题
This dictionary is very useful. It has ___ many problems about works and idioms for me.
A．looked up
B．kept up
C．taken up
D．cleared up
答案
答案：D
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This dictionary is very useful. It has ___ many problems about works and idioms for me.
A．looked up
B．kept up
C．taken up
D．cleared up
答案：D