B.seating,现在分词表主动进行的动作.
B.where在哪一点上的意思,如果是on which ,应是you must be firm on which you think yourself to be right about.
C.has been off to 表状态
B.seating,现在分词表主动进行的动作.
B.where在哪一点上的意思,如果是on which ,应是you must be firm on which you think yourself to be right about.
C.has been off to 表状态