第28题: [单项选择]While typing, Helen has a habit of stopping ______ to give her long and flowing hair a smooth. A. occasionally B. simultaneously C. eventually D. promptly 参考答案:A 答案解析:[解析] A项occasionally意为“偶尔,间或”。B项simultaneously意为“同时”; C项eventually意为“最终,终于”;D项promptly意为“立即;迅速地”。