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hewalkedupanddowntheroomforhalfanhour,behindhimawithhishandclaspingbhishandsclaspedchishandswereclaspeddashishandsclasped答案是B求详细解释啊啊啊O(∩∩)O谢谢

题目详情
he walked up and down the room for half an hour ,__behind him
a with his hand clasping b his hands clasped c his hands were clasped d as his hands clasped 答案是B 求详细解释啊啊啊 O(∩_∩)O谢谢
▼优质解答
答案和解析
他在房间里走了半个小时,手在背后紧握着.
A是with +宾语+宾补.握着手,手是被握着的,所以应该是 clasped.
B是独立主格结构.也就是 clasped有自己的逻辑主语his hands.如:
His homework finished,the boy went home.