It was recommended that passengers _____ smoke during the flight.
A
暂无解析
Toobtainasatisfactoryresult，onemustapplytwo（）ofpaintonacleansurface.
Ifasubstanceisdissolvedinwaterorheated，itmay（）agas.
Modern____perhaps causes more problems than it solves.
Even as a girl, _____ to be her life, and theater audiences were to be her teachers.