单选题________inadeepvoiceliketheso

单选题 ________ in a deep voice like the sound of a big gun, came the shout of a man on a horse．A.All of suddenB.All at onceC.All of the suddenD.All at the once

B解析该句为倒装结构。all at once＝all of a sudden＝suddenly表示“突然”。

哦，回答的不错