It's already 10 o'clock. I wonder how it ______ that she was two hours late on such a short trip.

【正确答案】 C

【答案解析】 考查动词短语语义辨析。句意：现在已经十点了。我真纳闷如此短的旅程她竟然晚了两个小时。come over“顺便来访，产生效果”；come out“出现，传出”；come about“发生”；come up“走近，接近”。故选C。