【单选题】I smoke out of ____ habit, not for ____ pleasure; for I have been in the habit for twenty years.
【单选题】The crowd backed away to let the wounded man pass ___ .
【单选题】房室交界处传导速度较慢的生理意义在于 房室交界处传导速度较慢
【单选题】I smoke out of ____ habit, not for ____ pleasure, and I have had this habit for twenty years. [ ]
【单选题】I smoke out of ______ habit, not for ____ pleasure; for I have been in the habit for 20 years.
【单选题】I smoke out of ______ habit, not for ______ pleasure; for I have been in the habit for more than twenty years.