When I went to say goodbye to Ann, she______ the piano.

下列分析别里科夫恋爱失败的原因，错误的是（）

___ smoking, he would not have got cancer in thelung.

To do more exercise, when I go out I use the bike _____ the car if possible[ ]

What does the sign over there read?―“No person ______ smoke or carry a lighted cigarette，cigar or pipe in this area．”