问题
选择题
Do you know what__________ before you __________?
A．was happened; came
B．is happening; come
C．had happened; came
D．happened; had come
答案
C
题目分析: 句意：你知道在你来之前发生什么了吗？before you came在你来之前，一般过去时；发生的事情在来之前，过去的过去为过去完成时，故选C。