—Would you mind the door?—Not at all.A. openB. openedC. openingD. opens

问题补充：

—Would you mind the door?

—Not at all.

A. open

B. opened

C. opening

D. opens

答案：

A. open

B. opened

(答案→)C. opening

D. opens

解析：句意：你介意打开门吗？完全不介意。would you mind doing sth？意为“你介词做某事吗？”为一常用句型，mind后面跟动词的ing形式做宾语；故选C。