It is not uncommon for （） problems of communication between old and young.A.there to be

It is not uncommon for （） problems of communication between old and young.A.there to be

B.there being

C.there to being

D.there be答案：A难度：1知识点：词汇与结构部分\辅导书\书A\结构A

A.there to be

B.there being

C.there to being

D.there be

正确答案：A

解析:词汇与结构部分\辅导书\书A\结构A

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