【答案】Your classroom is so clean . Of course . We_______ today .

Your classroom is so clean . Of course . We_______ today .

A. is cleaned B. was cleaned C. cleans D. have cleaned

【答案】

D

【解析】

句意“-你的教师真干净-当然，我们今天已经打扫了”。we和clean之间为主动关系，排除A和B，根据句意，指“已经打扫完了”，用现在完成时，故选D。