单选题 While he was in Beijing, he spent all his time______some important museums and buildings.
【正确答案】 A
【答案解析】解析：本题考查动词的词义辨析。visiting意为“参观(景点等)”，符合空后museums and buildings的语义。traveling意为“周游，旅行”；watching意为“观看(活动、比赛等)”；touring意为“在……旅行，参观(地点)”。