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________ from endless homework on weekends, the students now find their own activities, such as taking a ride together to watch the sunrise.
A.Freed B.Freeing C.To free D.Having freed
A

试题分析:考查分词做状语。本题的动词free摆脱…;使…免受…;与后面主语the students构成被动的关系,故使用过去分词在句中做状语。句意:在周末摆脱了无休止的家庭作业,学生们现在有了他们自己的活动,例如一起骑自行车去看日出。故A正确。
点评:当分词做状语的时候,如果构成分词的动词与句子的主语构成主动关系,就使用现在分词做状语;当二者构成被动关系,使用过去分词做状语。如果分词的动作发生在谓语动词之前,就使用分词的完成式。如果分词与句子的主语没有关系,可以使用状语从句或者独立主格结构。
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