--------Is it all right if I smoke here?
------- ，sir．This is a non-smoking section．
A. No way
B. Go ahead
C. Better not
D. As you please
网友回答
A. No way
B. Go ahead
(答案→)C. Better not
D. As you please
解析：考查交际用语。根据后句This is a non-smoking section这里是非吸烟区，可知答案。句意：——我在这里吸烟行么？——最好不要，先生。这里是非吸烟区。故C正确。