After being questioned by the police , he admitted ____in the supply of drugs over a 20-year period.
A.to be involved
B.being involved
C.involved
D.been involving
网友回答
B解析考察admit用法。Admit doing sth承认做某事；be involved in参与…;结合句意可知B正确。句意：被警察询问以后，他承认在20年期间里参与了毒品的运输。