_____ from endless homework on weekends the students now can have their own

_____ from endless homework on weekends the students now can have their own

题目
_____ from endless homework on weekends the students now can have their own
from endless homework on weekends the students now can have their own activities,such as taking a ride together to watch the sunrise.
A.Freed B.Freeing C.To free D.Having freed.
我想知道,为什么选A不能选D?
答案
过去分词可以表被动,A选项体现了.而D选项改为having been freed 就可以了啊,含有已经的意思
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