from endless homework on weekends, the students now find their own activities, such as taking a ride together to watch the sunwise.
A. Freed
B. Freeing
C. To free
D. having freed
网友回答
(答案→)A. Freed
B. Freeing
C. To free
D. having freed
解析：
本题考查free的用法。在这里free的意思为：解除负担、义务或限制。在本题中，free和句子的主语之间是一种逻辑上是动宾关系，所以要用过去分词形式，表示一种被动与完成。