no buses , we have to walk homeA. There wereB. There beingC. It wasD. It being

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A. There were
(答案→)B. There being
C. It was
D. It being
解析：考查独立主格结构：句意：因为没有公共汽车，我们只好走回家。两句之间用逗号隔开，且没有连词and/so等，说明前面是状语非谓语做状语，但是该非谓语有自己的独立主语there，所以用独立主格结构，there be之间为主动关系，用现在分词being。选B。