the graduation is sad, becausethe time ___- with other people has come to th

spent

spent with这个结构修饰time,spend的主语值可以是人，应该是I spent time with~~~
在这里做定语的话，没有人，那么就是把被动改一下 the time is spent with~~~~~~
作定语当然不能是完整句子了，那么去掉BE 动词就可以了