【题目】Can you explain how it _______ that you missed the morning classes?
A. came across B. came to
C. came up D. came about
在线课程【答案】D
【解析】考查短语辨析与固定句式。A. came across遇到 B. came to 来到 C. came up来了 。It comes about that...,表示...是...产生的。句意为你能解释一下你错过早上的课这件事是怎么发生的吗？D符合语境，故选D。