问题
选择题
30. This dictionary is of great use, which can help you_________many problems about words and idioms.
A．keep up
B．clear up
C．look up
D．take up
答案
答案：B
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30. This dictionary is of great use, which can help you_________many problems about words and idioms.
A．keep up
B．clear up
C．look up
D．take up
答案：B