单选题 It was ______ dark that we could hardly see the faces of each other.

【正确答案】 C

【答案解析】[解析] 译文光线太暗导致我们没法清楚地看到对方的脸。
本题考查固定搭配。so...that...结构，表示“如此…以至于…”，故选C。