We don't allow ________ here. Those who smoke are not allowed ________ here.

We don't allow ________ here. Those who smoke are not allowed ________ here.

A.smoking; smoking

B.to smoke; to smoke

C.to smoke; smoking

D.smoking; to smoke

答案及解析： D

解析：

allow doing允许做某事/allow sb. to do…允许某人做某事