单选题
If the heavy rain had ______ an extreme high tide, serious flooding would have resulted.
【正确答案】
C
【答案解析】[解析] 动词词组辨析。happened to“碰巧”；occurred to“想到；想起”；coincided with“符合；与……相一致”；turned out“发生；最后是；结果是”。根据句意“如果大雨和海啸一起出现的话，就会引起严重的洪水”，只有coincided with符合。故答案为C。