He walked up and down the room for half an hour, behind him.
A. with his hands clasping
B. his hands clasped
C. his hands were clasped
D. as his hands clasped
网友回答
A. with his hands clasping
(答案→)B. his hands clasped
C. his hands were clasped
D. as his hands clasped
解析：可联系答.案.网客服索取。