【题目】We never allow ________ in the office．Who allows him ________ here?
A.smoking; to smoke
B.smoking; smoking
C.to smoke; smoking
D.to smoke; to smoke

【答案】A
【解析】句意：我们从不允许在办公室抽烟。是谁允许他在这抽烟的。allow doing允许做某事；allow sb to do sth 允许某人做某事。根据结构可知答案为A。