----Where did you put the broom,Tom?
-----I it behind the door．But now it is gone．
A. do put
B. do putting
C. did to put
D. did put
网友回答
A. do put
B. do putting
C. did to put
(答案→)D. did put
解析：强调谓语动词用助动词do\did\does+动词原形，did强调过去的动作。句意：“汤姆你把笤帚放哪里了？”“我确实把它放门后了但是现在不见了”