Because he no longer reads the journals, he is ()of the latest developments in the field.
innocent
deprived
suspicious
ignorant
词义辨析:innocent 无辜的;deprived 贫困的;suspicious 可疑的;ignorant 无知的。句意:因为他不再读这些期刊,所以他对这一领域的最新发展一无所知。