試題詳解

17.According to the above paragraph, one of the following factors which is NOT necessary for the successful operation of the pickpocket is
(A) his proficiency in the operations required to pickpockets
(B) that the right potential victims be those who have been the subject of such a theft previously
(C) that his operations be hidden from the view of others
(D) that the potential victim be unaware of the actions of the pickpocket