—We don’t permit in our school. Would you please put your cigarette out?—Forgive me. I did

—We don’t permit in our school. Would you please put your cigarette out?
—Forgive me. I didn’t know.
A. to smoking
B. to smoke
C. smoking
D. having smoked

A. to smokingB. to smoke(答案→)C. smokingD. having smoked解析：考查非谓语动词。permit doing sth禁止做某事，根据句意故选C。

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