______ of the burden of two bags, the balloon climbed up and drifted to the Nort

游客2023-11-22  18

问题 ______ of the burden of two bags, the balloon climbed up and drifted to the North.

选项 A、Freed
B、To be freed
C、Freeing
D、To free

答案 A

解析 在本题中,过去分词短语作表示时间的状语,其语法功能相当于 After/When the balloon was freed of the burden of two bags...”由于free表示的是句子主语the balloon所承受的动作,表示的是被动关系,所以应用过去分词的形式。
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