We do not permit in the office.A. others smokingB. to smokeC. smokedD. smoking

问题补充：

We do not permit in the office.

A. others smoking

B. to smoke

C. smoked

D. smoking

答案：

A. others smoking

B. to smoke

C. smoked

(答案→)D. smoking

解析：本题考查非谓语动词。permit doing允许做某事。句意：我们不允许在办公室里吸烟。