题目内容

It is not uncommon for there     problems of communication between the old and the young.
A．beingB．would beC．beD．to be
D
考查句型：It is +adj for sb to do sth，it是形式主语，不定式是真正的主语，逻辑主语是there，动词用be，句意：在老人和年轻人之间有交流问题，很正常。选D。
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