问题描述：
What we need to look up in the dictionaries --------the meanings of the new words.
What we need to remember -----how to use the words correctly.
A.are,is B.is is C.is are 为什么?
What we need to remember -----how to use the words correctly.
A.are,is B.is is C.is are 为什么?
问题解答：
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