— Sally our monitor was late for her class this morning. — ? As far as I know she never

问题补充：

— Sally, our monitor, was late for her class this morning.

— ? As far as I know, she never came late to class.

A. How come

B. What for

C. So what

D. Why not

答案：

(答案→)A. How come

B. What for

C. So what

D. Why not

解析：考查交际用语：How come=怎么会这样？ so what=这有什么关系？ why not= 为什么不？ what for=why，句意：---sally,我们的班长今天早上上课迟到了。--怎么回事？据我所知，她从不上课迟到的。选A。