单选题 — Did you come to the museum by bike yesterday?
—No. Two metres of snow fell during the night. As a result, several main roads ______.

【正确答案】 A

【答案解析】[解题指要] 该题测试动词时态以及语态的用法。题中Did you come…中的Did是关键词。 As a result 指当时的“结果是……”，故选用一般过去时配合。B选项had been blocked 意指动作 block先于其前的动作fell发生，逻辑有误，故不用。