单选题 While typing, Kathy had a habit of stopping ______ to give her long and flowing hair a smooth.
【正确答案】 D
【答案解析】[解析] A项意为“即刻地,迅速地”;B项意为“同时地”;C项意为“最终”;D项意为“偶尔”。因此,D选项符合题意。