—I hear Kris had an accident as he was riding his bike to school yesterday.—？ He is always

问题补充：

—I hear Kris had an accident as he was riding his bike to school yesterday.

—？ He is always so careful when he is riding.

A. What for

B. How come

C. Why that

D. So what

答案：

A. What for

(答案→)B. How come

C. Why that

D. So what

解析：B 考察交际英语。句义：—我听说kris骑车上学的时候遇见了车祸、—怎么会？她很小心的。根据句义说明B正确。