__from endless homework on weekends,the students now find their own activitiesA.freed B.freeing C.to free D.having freed为什么答案选A不是B啊?

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__fromendlesshomeworkonweekends,thestudentsnowfindtheirownactivitiesA.freedB.freeingC.tofreeD.having

__from endless homework on weekends,the students now find their own activitiesA.freed B.freeing C.to free D.having freed为什么答案选A不是B啊?
__from endless homework on weekends,the students now find their own activities
A.freed B.freeing C.to free D.having freed
为什么答案选A不是B啊?

__from endless homework on weekends,the students now find their own activitiesA.freed B.freeing C.to free D.having freed为什么答案选A不是B啊?
这是悬垂状语的用法
只能选A
该问题可以翻译成:周末,从无尽的作业当中解脱,现在学生们找到咯属于他们自己的活动.
根据逻辑关系,“从无尽的作业当中解脱”的是“学生”,而逗号前面部分无主语,那么,“free”的主语只能是“学生”.所以,根据悬垂状语的规则,用过去分词“freed”!
明白吗?
再如:Seen from the Mountain ,the city is beautiful.