Thethieftookawaythewoman’swalletwithout________.
A、beingseenA
without 是介词，其后的动词必须用动名词形式。根据句意，此句需要用被动形式，所以答案是 A 。
Well-arrangedsentencesareconsideredgrammaticalsentencesthatareformedfollowingasetofsyntacticrules.
It is not decided ________ the conference will be held.
The volunteers would rather go by train than ________.
Weather _______, we ’ll go out for a walk.
This is an important problem _______ too few social scientists have researched.
