单选题 When he lived in that remote place, radio was the only means be had to keep ______ of current events in the country.

【正确答案】 D

【答案解析】(track行踪；keep track of掌握……的线索，保持对……的联系)。句意为：他在偏僻的地方生活时，收音机是他及时了解国家时事的唯一工具。A．account叙述，描写；B．trace踪迹；C．record记录，记载。