After by the police for several days, the robber had to give in. A. surroundingB. surround

网友回答

A. surrounding
B. surrounded
C. surround
(答案→)D. being surrounded
解析：考察非谓语动词，after 是介词，后面的动词要用doing形式，后面的主语the robber与surround之间是被动关系，所以选择D
句意为，在被警察包围了几天之后，那个强盗最终屈服了