为什么选C 不选D.麻烦解释一下最后一个空.

为什么选C 不选D.麻烦解释一下最后一个空.1、Nearly at 6 o’clock in the evening we reached ________ small village ________ east of _________ famous river.A.the; the; the B.a; the; the C.a; \; the D.a; \; \