[紧急求助]I realized that she ( ) in.用had come 还是came?为什么?要如何判断?

题目

[紧急求助]I realized that she ( ) in.用had come 还是came?为什么?要如何判断?

答案

had come
她进来这个动作在我注意到之前已经完成,所以用过去完成时