【题目】—Would you permit me __________ here? —Sorry. We don't permit __________ in the lab.
A.smoking; smoking
B.to smoke; to smoke
C.smoking; to smoke
D.to smoke; smoking

【答案】D
【解析】permit后接宾语时，在其后使用不定式结构，不接宾语时，使用动名词结构。permit sb. to do sth.意为“允许（某人）做某事”。permit doing sth.意为“允许做某事”。故选D。