各位老师好!有这样一道选择题:
—Mom, I got to school 10 minutes late this morning.
—_____, Tom? You left home very early, didn't you?
A. How come B. How about you
C. How's your day D. How can I help you
参考答案是 A. How come。但是,我查词典发现 A. How come 后面都是接一个句子,这里为什么不是接句子呢?