单选题 It ______ heavily so there was deep snow on the road.
[A] snows [B] snowed [C] had snowed

【正确答案】 C
【答案解析】[解析] 本题考查动词时态。there was 是过去式，so 表示结果，所以横线处要用过去完成时，表示“过去的过去”。