—you were so late this morning?—I forgot to set the alarm before going to bed last night.A

问题补充：

—you were so late this morning?—I forgot to set the alarm before going to bed last night.

A. Why

B. How come

C. How about

D. How

答案：

A. Why

(答案→)B. How come

C. How about

D. How

解析：How come ...? 为一表达法, 用以表示不理解情况是如何发生的场合, 如: If she \ spent five years in Paris, how come her French is so bad?

【标签】习惯用语