We had to walk home that night, tired , on account of , to our disappointment, ．
A. there not being buses
B. there not having buses
C. there were no buses
D. there had no buses
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(答案→)A. there not being buses
B. there not having buses
C. there were no buses
D. there had no buses
解析：考查动名词的复合结构，分析句子是;所填部分是动名词做on account of的宾语，而且考查的是there be句型，句意是：那天晚上我们不得不走回家，因为令我们失望的是没有公共汽车了。选A。