Nearly 200 people entered the area to mine diamonds in 2000, and eventually had to be driven off by the police.
A. irregularly
B. illegally
C. imperfectly
D. unusually
网友回答
A. irregularly
(答案→)B. illegally
C. imperfectly
D. unusually
解析：考查副词词义辨析。A不规律的；B非法地；C不完美地；D不同寻常地；句意：在2000年有大约200人非法进入这个地区开采钻石，最终都被警察驱赶出去了。根据句意说明B正确。