It was that all of us were tired out when we arrived.
A. so long a way
B. such long a way
C. so long way
D. such long way
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(答案→)A. so long a way
B. such long a way
C. so long way
D. such long way
解析：考查so, such用法。So后面接形容词或者副词；such后面接名词.但二者是可以互换使用的such a/an adj 名词=so adj a/an 名词。故本题so long a way= such a long way。故A正确。