— you were so late this morning?
— forgot to set the alarm before going to bed last night.
A. Why
BHow e
CHow about
D. How
网友回答
A. Why
(答案→)B. How e
C. How about
D. How
解析：考查疑问词的用法。“你今天上午为什么这么晚？”“昨晚睡前忘记设定闹钟了。”why和how后应该用疑问语序，how about后跟名词、代词、动名词；how about“为什么，怎么会......”，句子不用疑问语序。故选B。