I heard the alarm ringing all the morning. something very urgent happened.
A. Really
B. Obviously
C. Especially
D. Terribly
网友回答
A. Really
(答案→)B. Obviously
C. Especially
D. Terribly
解析：考察副词。Really 真正地 obviously 明显地 especially 尤其地，特别的terribly 非常地
句意为，我听到警报响了一个上午，很明显，有什么紧急的事情发生了。