_____someone smoking.⒈is ⒉are ⒊do ⒋does

_____someone smoking.⒈is ⒉are ⒊do ⒋does smoking smoking no smoking! NO SMOKING smoking hot smoking是什么意思 smoking意思 smoking是什么意思 I was walking in the street _____someone calledI was walking in the street _____someone called me from behind all of a suddenA when B while C because D though stop smoking before smoking stops you smoking is allowed 为什么用smoking? stop smoking=（）（）smoking Someone is smoking.对smoking提问 英语作文“no smoking” No smoking作文 non-smoking正确不? non-smoking section是什么意思?